basic

basic — adjective

1. providing the main support or starting point that something else depends on

1.形容詞B1
釋義

providing the main support or starting point that something else depends on

例句

After the flood, clean water and blankets were basic needs.

collocation: basic needs

The course teaches basic rules before students write full essays.

同義詞
  • fundamental

    more formal but very close in meaning

  • essential

    stresses that something cannot be left out

  • central

    focuses on importance within a system or discussion

反義詞
  • secondary

    less important and not part of the main support

  • peripheral

    outside the main or necessary part

文法句型

basic to something

basic needs

basic skills

用法筆記

Often appears with nouns such as need, right, rule, and skill. Distinguish from sense 2, which is about easy or first-stage versions rather than importance.

常見錯誤

Sleep is basic for health.
Sleep is basic to health.
💡when something is essential to another thing, basic often takes to.

2. at an easy, early, or reduced level, without advanced features

2.形容詞B1
釋義

at an easy, early, or reduced level, without advanced features

例句

The app gives beginners a basic plan for each day.

basic + noun for a simple version

Before art school, Mia took a basic drawing course.

同義詞
反義詞
  • advanced

    at a higher and more difficult level

  • complex

    containing more parts or difficulty

文法句型

basic + noun

a basic version

basic English / math / plan

用法筆記

Usually describes beginner-level lessons, simple equipment, or stripped-down versions of something. Distinguish from sense 1: this sense is about difficulty and detail, not what is most important.

常見錯誤

This is a basis course.
This is a basic course.
💡basis is a noun, but basic is the adjective for an easy first-level course.

3. plain and unexciting, in a way that feels too common to impress people

3.形容詞C1
釋義

plain and unexciting, in a way that feels too common to impress people

例句

Her outfit looked basic beside the dancers' bright stage clothes.

informal negative comment on style

On TikTok, users called the beige kitchen basic and forgettable.

同義詞
  • plain

    describes something with little decoration or interest

  • ordinary

    neutral or mildly negative, with nothing special

  • dull

    stronger and more clearly negative

反義詞

文法句型

look basic

sound basic

a basic design

用法筆記

Common in informal comments about fashion, taste, playlists, or design, and it usually carries criticism. Distinguish from sense 2, which can be neutral and simply mean easy or first-level.

常見錯誤

The room was basic' when you mean 'simple but useful.
The room was simple but useful.
💡sense 3 is usually negative and suggests something is dull or unoriginal.

4. describing the amount of pay someone gets before bonuses, overtime, or other ext

4.形容詞C1
釋義

describing the amount of pay someone gets before bonuses, overtime, or other extra money

例句

Her basic pay rose in April, before any sales bonus.

basic pay before extras

At orientation, the contract listed basic pay and meal money separately.

同義詞
  • base

    used in compounds such as base salary

  • fixed

    stresses that the amount does not include variable extras

反義詞
  • overtime

    extra money earned for extra hours, not the starting rate

  • bonus

    additional pay beyond the fixed amount

文法句型

basic pay

basic salary

用法筆記

Almost always appears before pay or salary in contracts, job ads, and payroll discussions. The focus is the fixed starting amount, not the total amount a worker finally receives.

常見錯誤

My bonus is part of my basic pay.
My bonus is added to my basic pay.
💡basic pay is the amount before extra payments.

5. used for a substance that acts like a base in chemistry, usually with a pH above

5.形容詞C2
釋義

used for a substance that acts like a base in chemistry, usually with a pH above seven

例句

Soap is basic, so it turns red test paper blue.

basic contrasted with test result

The lab marked the liquid basic after the pH test.

mark something basic

同義詞
  • alkaline

    the more common everyday science word

  • caustic

    stronger and often suggests a substance that can burn or damage

反義詞
  • acidic

    having the qualities of an acid

文法句型

be basic

basic solution

basic liquid

用法筆記

Common in chemistry, especially with words like solution, liquid, and pH, and often contrasted with acidic. In general science writing, alkaline is often the more usual everyday synonym.

常見錯誤

The liquid is base.
The liquid is basic.
💡base is usually the noun, while basic is the adjective in this chemistry sense.

6. describing igneous rock that is low in silica and rich in iron and magnesium

6.形容詞C2
釋義

describing igneous rock that is low in silica and rich in iron and magnesium

例句

The chart labels this dark lava rock basic, not acidic.

basic rock in geology

Geologists call basalt basic because it contains little silica.

pattern: call something basic

同義詞
  • mafic

    technical geology term that strongly overlaps with this idea

  • low-silica

    describes the composition more directly

反義詞
  • acidic

    used in geology for rock with higher silica content

文法句型

basic rock

be basic

用法筆記

Restricted to geology and usually used with rock or in descriptions of basalt-like material. Distinguish from sense 5, which is the chemistry use for substances with alkaline behavior.

basic — noun