open up

IPA/ˈəʊpən ˈʌp/
IPA/ˈoʊpən ˈʌp/

open up — 片語動詞

  • open upbase form
  • opens up3rd person singular
  • opening up-ing form
  • opened uppast simple

1. to pull, push, lift, or cut apart the parts of something that is closed, sealed,

1.片語動詞及物 / 不及物A2
釋義

打開

將關閉或封住的物體開啟

to pull, push, lift, or cut apart the parts of something that is closed, sealed, or locked, so that the inside can be reached, looked at, or used. Often used when some effort or force is needed.

例句

The doctor opened up the wound to remove the small pieces of glass.

醫生切開傷口,取出小玻璃碎片。

collocation: open up a wound / a package / a container

Adina opened up the suitcase on the bed and pulled out her clothes.

Adina 在床上打開行李箱,拿出她的衣服。

transitive: open up + [container]

同義詞
  • open

    more neutral and general; 'open up' is slightly more informal or emphatic

  • cut open

    more specific, implies using a blade

  • unseal

    formal register, used for official or sealed items

反義詞
  • close up

    to shut something completely, opposite of opening

  • seal

    to close something tightly so the inside cannot be reached

文法句型

open up + noun phrase (container, door, package, wound)

open + noun phrase + up

open up (intransitive)

用法筆記

More informal than the plain verb 'open'. The object can come between 'open' and 'up' (open the box up). In medical contexts, 'open up a wound' is the standard phrasing for surgically reopening.

常見錯誤

She opened up the door with her key.
She opened the door with her key.
💡For routine everyday actions like unlocking a door, use 'open' alone. 'Open up' fits when some effort is involved.

2. to begin serving customers at a shop, restaurant, or café for the current day, e

2.片語動詞及物 / 不及物A2
釋義

開店

商店開始每日營業

to begin serving customers at a shop, restaurant, or café for the current day, especially by unlocking the doors and preparing the premises for people to enter.

例句

The bakery opens up at six in the morning every day except Sunday.

這家麵包店每天早上六點開門營業,只有星期日休息。

intransitive: open up at [time]

Felix opened up the café early because of the big street festival that day.

因為當天有大型街頭慶典,Felix 提早開了咖啡店。

transitive: open up + [business]

同義詞
  • open

    more neutral; 'open up' feels slightly more informal and thorough

反義詞
  • close up

    to shut the business at the end of the day

文法句型

open up (at + time)

open up + noun phrase (shop, store, café)

open + noun phrase + up

用法筆記

Transitive when the speaker says which business is being opened; intransitive when the business is already known from context. Contrasts with 'close up' for the end of the day. Use the simple present tense for habitual opening times.

常見錯誤

The new restaurant will open up next week.' (if you mean opening for the first time)
The restaurant opens up at ten every morning.
💡For daily opening times, use the simple present. For a brand-new business, see sense 3.

3. to create and start running a new company, store, restaurant, or other commercia

3.片語動詞及物 / 不及物B1
釋義

開設

創立新的商店或公司

to create and start running a new company, store, restaurant, or other commercial venture that did not exist in that location before.

例句

After years of baking at home, Allison opened up a cake shop on Market Street.

在家烘焙多年後,Allison 在市場街上開設了一間小蛋糕店。

transitive: open up + [type of business]

A new yoga studio opened up in the old building where the library once stood.

原本圖書館所在的舊建築裡,開了一間新的瑜伽教室。

intransitive: [business] opened up + [location]

同義詞
  • set up

    focuses on the preparation stage

  • establish

    more formal, often used for larger companies

  • start

    more general, can apply to any venture

反義詞

文法句型

open up + noun phrase (a shop, restaurant, business, store)

open up (intransitive — a new restaurant opened up)

用法筆記

Distinguish from sense 2: sense 2 is about beginning the day's business at an existing shop; sense 3 is about founding a new enterprise for the first time. Intransitive use describes a new business appearing in a location.

常見錯誤

I opened up my computer to check emails.
I opened up a coffee shop last year.
💡'open up' for starting a business is different from physically opening a device (sense 1).

4. when an event, policy, or decision creates new opportunities, choices, or possib

4.片語動詞及物B1
釋義

開創

創造新機會或可能性

when an event, policy, or decision creates new opportunities, choices, or possibilities that did not exist before, making them available for people to use or enjoy.

例句

The new railway line opened up job opportunities for thousands of people in the region.

新的鐵路線為該地區數千人開創了就業機會。

collocation: open up opportunities / open up markets

Learning Mandarin opened up better job opportunities for Felipe in Shanghai.

學習中文為 Felipe 在上海開創了更好的就業機會。

[skill/experience] + opens up + [opportunities]

同義詞
  • create

    broader, less vivid; 'open up' implies something was previously blocked

  • unlock

    more figurative, about releasing potential that was trapped

反義詞
  • block

    deliberately prevent access or possibility

  • close off

    remove the chance to use something

文法句型

open up + noun phrase (opportunities / markets / possibilities / doors)

用法筆記

Transitive only — requires a direct object. Subject is typically an event, policy, technology, or decision, not a person acting directly. Often used with nouns like 'opportunities', 'markets', 'possibilities', 'doors', or 'choices'. Frequently positive in tone.

常見錯誤

The new policy opened up the problem of funding.
The new policy created the problem of funding.
💡'open up' is used for positive or neutral new possibilities, not for creating difficulties or problems.

5. when a job, position, or opportunity becomes available, it appears or is freed f

5.片語動詞不及物B1
釋義

出現

機會或職位變得可用

when a job, position, or opportunity becomes available, it appears or is freed for someone to take or use, often unexpectedly or at a specific time.

例句

A teaching position at the international school opened up just when Wren needed it.

就在 Wren 需要的時候,那所國際學校出現了一個教職空缺。

intransitive: a position / job / spot opens up

After the manager retired, several new roles opened up in the sales department.

經理退休後,業務部門出現了幾個新的職位。

同義詞
  • become available

    more literal, less idiomatic

  • appear

    broader, not limited to job contexts

  • arise

    slightly more formal, suggests a natural emergence

反義詞
  • close

    stop being available

文法句型

[job / position / opportunity / spot / role] + opens up

用法筆記

Always intransitive — the job or opportunity is the subject, not the person who takes it. The subject is a desirable opening (job, role, spot, vacancy), not a problem or negative situation. Distinguish from sense 4, where someone actively creates the opportunity (transitive).

常見錯誤

The company opened up a new position for me.
A new position opened up at the company.
💡When a position becomes available on its own, use the intransitive pattern. For the company actively creating it, use sense 4 (transitive).

6. to bring hidden information, facts, or secrets to light so that people can learn

6.片語動詞及物B2
釋義

揭露

使隱藏事實或資訊曝光

to bring hidden information, facts, or secrets to light so that people can learn about them, often through investigation or research.

例句

The journalist's investigation opened up evidence of illegal fishing in protected waters.

記者的調查揭露了在保護水域進行非法捕魚的證據。

collocation: open up evidence / open up facts

Andrés opened up a hidden world of underground music when he launched his podcast.

Andrés 在推出 podcast 後,揭露了一個隱藏的地下音樂世界。

collocation: open up a hidden world of [something]

同義詞
  • uncover

    more direct synonym, implies lifting a cover

  • disclose

    more formal, often used in legal or official contexts

  • expose

    stronger connotation of wrongdoing or scandal

反義詞

文法句型

open up + noun phrase (evidence / facts / secrets / details)

用法筆記

Subject is typically an investigation, study, inquiry, or inquisitive action. Unlike sense 4 (CREATE OPPORTUNITIES), the focus here is on exposing what was hidden rather than creating something new. Often used with abstract nouns like 'world', 'facts', 'evidence'.

7. to begin talking honestly about your personal thoughts, feelings, or problems, e

7.片語動詞不及物B1
釋義

吐露心聲

開始坦誠分享內心感受

to begin talking honestly about your personal thoughts, feelings, or problems, especially when you are usually private or shy about such topics and it takes time to feel comfortable enough.

例句

Leo opened up to his sister about how nervous he felt starting his new job.

Leo 向姊姊吐露心聲,說他對於新工作感到非常緊張。

pattern: open up + to + person + about + topic

It took hours of careful questions before Diego opened up about his childhood.

經過好幾個小時小心翼翼的提問,Diego 才終於敞開心扉談到他的童年。

open up about [topic]

同義詞
  • confide

    stronger focus on trusting the listener with private information; used with 'in' (confide in someone)

  • unburden oneself

    more formal; emphasises relief after sharing worries

  • speak out

    more about expressing a public opinion rather than sharing personal feelings

反義詞
  • clam up

    informal opposite; means to suddenly stop talking or refuse to speak

  • shut down

    informal; means to stop communicating emotionally or to withdraw

文法句型

open up (about + topic)

open up (to + person)

open up (about + topic + to + person)

用法筆記

Intransitive only — never takes a direct object. Commonly followed by about + topic and/or to + person. The subject is someone who was previously guarded, shy, or hesitant about sharing. This sense implies emotional trust built over time.

常見錯誤

He opened up the secret to his friend.
He opened up about the secret to his friend.
💡This sense of 'open up' is intransitive; do not add a direct object. Use 'about' to introduce the topic.

8. when a wide, impressive view or open space appears in front of you as you move i

8.片語動詞不及物B1
釋義

展現

景色或空間在眼前攤開

when a wide, impressive view or open space appears in front of you as you move into a new position, especially after passing through a narrow or obstructed area.

例句

After climbing the hill, a beautiful lake opened up before Takeshi and his friends.

爬上山丘後,一片美麗的湖泊在 Takeshi 和朋友們面前展現開來。

intransitive: view / valley / scene opens up before [someone]

When they reached the mountain top, the entire valley opened up beneath them.

他們到達山頂時,整個山谷在他們腳下展開。

preposition: opens up beneath / before / ahead

同義詞
  • spread out

    more neutral, less vivid

  • unfold

    suggests a gradual revealing, like petals or a map

  • come into view

    emphasises the observer's experience, not the scene's action

反義詞

文法句型

[view / scene / valley / landscape] + opens up + [preposition (before / beneath / ahead)]

用法筆記

Almost always used with a scenic or spatial subject (view, valley, landscape, panorama). Intransitive — the scene itself spreads out before the observer; no one actively opens it. Common prepositions: before, beneath, ahead, below.

9. to become wider or to make a narrow space wider by removing an obstacle, wall, o

9.片語動詞及物 / 不及物B2
釋義

拓寬

使狹窄空間變寬

to become wider or to make a narrow space wider by removing an obstacle, wall, or barrier, creating more room or an open area.

例句

The narrow dirt track opened up into a proper paved road near the village.

那條狹窄的泥土小徑在村莊附近拓寬成了一條像樣的柏油路。

intransitive: narrow space opens up into [wider area]

Joon carefully opened up the hole in the fence so the pipe could fit through.

Joon 小心翼翼地把籬笆上的洞挖大,讓水管能夠穿過去。

transitive: open up [opening/hole]

同義詞
  • widen

    more direct synonym, but lacks the idiomatic flavour

  • broaden

    similar but suggests lateral expansion rather than removal of an obstacle

  • expand

    suggests growth in all directions, not just width

反義詞
  • narrow

    to become narrower; the opposite direction

文法句型

open up + noun (transitive: make a space wider)

noun + open up + into + noun (intransitive: space becomes wider)

用法筆記

Often used with 'into' to describe what the wider space becomes ('opened up into a courtyard'). Differs from sense 8 (VIEW APPEARS): sense 8 is about a panoramic vista appearing suddenly; sense 9 is about physically expanding a space or a passage becoming wider.

常見錯誤

She opened up her eyes wide to see better.
She opened her eyes wide to see better.
💡'open up' is not used with body parts; use the simple verb 'open' instead.

10. to start firing from weapons such as guns, cannons, or missile launchers, especi

10.片語動詞不及物C1
釋義

開火

開始用槍炮射擊(軍事)

to start firing from weapons such as guns, cannons, or missile launchers, especially in a battle, military conflict, or armed confrontation.

例句

The soldiers opened up with heavy machine guns when the enemy came closer.

敵軍靠近時,士兵們用重型機關槍開火了。

military use: open up with [weapon]

The warship opened up on the enemy base at dawn, firing large shells.

軍艦在黎明時對敵軍基地開火,發射了巨大的炮彈。

open up on [target]

同義詞
  • open fire

    more common equivalent; 'open fire on' is the standard formal military phrasing

  • start shooting

    less formal, wider range of contexts including non-military

反義詞

文法句型

open up (on/at + target)

open up (with + weapon)

用法筆記

Almost exclusively found in military, police, or action-film contexts. The subject is a person, group, or military unit operating a weapon. The preposition 'on' or 'at' introduces the target; 'with' introduces the weapon type. Intransitive only.

常見錯誤

The soldiers opened fire up at the enemy.
The soldiers opened up at the enemy.
💡'open up' already includes the idea of firing; adding 'fire' is redundant.