foggy

foggy — adjective

1. so full of mist or low-hanging cloud that you cannot see clearly where you are o

1.形容詞A2
釋義

so full of mist or low-hanging cloud that you cannot see clearly where you are or what is around you; also used for a glass or window surface that has steam on it, making it hard to see through

例句

The ferry stayed in port because the harbour was too foggy for safe sailing.

literal weather: foggy harbour/road/path

Linh wiped the foggy bathroom mirror with a towel so she could see her reflection.

steamed surface: foggy mirror/window/glass

同義詞
  • misty

    weaker than foggy; mist has smaller water droplets and slightly better visibility

  • hazy

    suggests a general lack of clarity in the air, not necessarily caused by fog; can also be from heat or smoke

  • cloudy

    used for the sky rather than ground-level air; a cloudy sky does not mean foggy ground conditions

反義詞
  • clear

    no fog or mist; easy to see

  • sunny

    bright with sunshine, the opposite of foggy weather

文法句型

foggy + noun

linking verb + foggy

常見錯誤

❌It is foggy to go outside today.
✅It is foggy outside today.
💡foggy is an adjective describing the weather, not a structure for permission or possibility.
❌The window is foggy because I forgot to clean it.
✅The window is foggy because of the steam from the hot shower.
💡when used for surfaces, foggy means covered with condensed water vapour, not simply dirty.

2. unable to think in a clear or quick way, often because you have not slept enough

2.形容詞B1
釋義

unable to think in a clear or quick way, often because you have not slept enough, are sick, or have taken medicine that affects your concentration

例句

Ishaan felt so foggy after three hours that he could not follow the lecture.

feel + foggy (mental state from tiredness)

The cold medicine made Sivan foggy and drowsy, so she stayed home instead of driving.

make + [person] + foggy (external cause)

同義詞
  • groggy

    more specific to tiredness or weakness after waking up or being ill; less formal than foggy

  • dazed

    suggests shock or surprise rather than natural tiredness

  • muddled

    emphasises confused thinking rather than slowness; can be used for organised thoughts

反義詞

文法句型

linking verb + foggy

feel + foggy

make + [person] + foggy

用法筆記

This sense describes a temporary state of reduced mental sharpness caused by external factors such as lack of sleep, illness, medication, or jet lag. It is almost always used in predicative position (e.g. 'I feel foggy,' 'My head is foggy') rather than before a noun. Distinguish from sense 3 (VAGUE MEMORY), which is about memory of past events or knowledge of a subject rather than current mental clarity.

常見錯誤

❌I feel foggy about yesterday's meeting.
✅I am foggy about yesterday's meeting.
💡for a confused mental state (sense 2), 'feel foggy' is correct; but 'foggy about' followed by a topic shifts the meaning to sense 3 (hazy memory). Use 'feel foggy' without 'about' for mental confusion.

3. not able to remember past events or details clearly; having very little knowledg

3.形容詞B1
釋義

not able to remember past events or details clearly; having very little knowledge about a particular subject

例句

I am foggy about what happened after the toast but recall the party's first hour.

pattern: foggy about + [event/details]

Joon was foggy on the lease terms and asked the landlord to explain each clause.

pattern: foggy on + [topic/subject]

同義詞
  • hazy

    very similar to foggy for this sense; hazy may suggest a less severe degree of unclearness

  • vague

    describes the quality of the memory itself ('a vague recollection') rather than a person's state

  • sketchy

    informal; suggests that only a rough outline of the facts is known

反義詞
  • vivid

    very clear, bright, and detailed in memory

  • crystal-clear

    completely clear, as if just seen or experienced

文法句型

be + foggy + about + [topic]

be + foggy + on + [topic]

foggy + in + [possessive] + mind / memory

用法筆記

This sense is about the clarity of stored knowledge or memory. The fixed expression 'not have the foggiest (idea/notion)' is a common emphatic idiom meaning 'have absolutely no idea' — see Idioms below. Distinguish from sense 2 (CONFUSED MIND), which describes current mental function rather than knowledge recall.

常見錯誤

❌I don't have the foggiest where my keys are.
✅I don't have the foggiest idea where my keys are.
💡the idiom requires 'idea' or 'notion' after 'foggiest'; dropping it is ungrammatical in standard English.

❌ 'I am foggy about the math problem because I did not sleep well.' — this mixes sense 3 (hazy about details) with sense 2 (tiredness). If the cause is tiredness, use sense 2 without 'about': 'I feel foggy because I did not sleep well.'