bad
gb/bˈæd/ us/bˈæd/
A1
英語
~ 400
語義
0件の語義
adjective
A1
property
1
Of poor quality or standard
Not good in quality or standard.
用法パターン：
[something] is bad
よくある間違い：
Learners sometimes confuse 'bad' with 'badly' when describing verbs. Use 'bad' for nouns and 'badly' for actions.
類義語
poor (Similar meaning but slightly more formal and less emotionally loaded.)
対義語
good (Direct opposite in terms of quality or standard.)
コロケーション
bad weather
|bad idea
|bad habit
|bad service
|bad luck
テーマ
daily life
|evaluation
|core_vocabulary
例文
- The food at that restaurant was really bad.
- He made a bad decision that cost the company money.
- We had bad weather all week.
- That movie had bad acting and a weak plot.
- This printer makes bad copies.
学習者向け例文
- The coffee tastes bad.
- It is a bad photo.
- My phone has a bad battery.
- She has a bad job.
- This pen is bad.
adjective
A2
property
2
Harmful or dangerous
Causing harm or problems.
用法パターン：
[something] is bad for [someone/something]
類義語
harmful (More formal and often used in scientific or health contexts.)
対義語
beneficial (Opposite in meaning, indicating something that helps or improves.)
コロケーション
bad for your health
|bad influence
|bad effect
|bad for the environment
テーマ
health
|safety
|core_vocabulary
例文
- Smoking is bad for your health.
- Too much sugar is bad for your teeth.
- Lack of sleep is bad for concentration.
- Pollution is bad for the environment.
- This medicine can be bad for your stomach.
学習者向け例文
- Sugar is bad for your teeth.
- Smoking is bad for you.
- Cold weather is bad for my skin.
- Not sleeping is bad for me.
- Fast food is bad for health.
adjective
A2
property
3
Morally wrong or evil
Not good or right in a moral way.
用法パターン：
[someone] is a bad [person/thing]
類義語
immoral (More formal and specifically refers to breaking moral codes.)
対義語
good (In moral terms, meaning virtuous or ethical.)
コロケーション
bad person
|bad behavior
|bad intentions
テーマ
ethics
|behavior
|core_vocabulary
例文
- He is a bad man who cheats people.
- It was a bad thing to lie to your friend.
- Stealing is a bad act.
- She has a bad reputation because she often breaks the law.
- That was a very bad choice morally.
学習者向け例文
- He is a bad man.
- Stealing is bad.
- It is bad to lie.
- She did a bad thing.
- They are bad people.
adjective
informal
A2
property
4
Very unpleasant or severe
Very unpleasant or serious.
用法パターン：
[someone] has a bad [pain/problem/situation]
類義語
terrible (Stronger emotional tone than 'bad'.)
対義語
mild (Opposite in degree when describing unpleasantness or severity.)
コロケーション
bad headache
|bad day
|bad accident
テーマ
emotions
|daily life
|core_vocabulary
例文
- I have a bad headache today.
- They were in a bad car accident.
- We had a bad day at work.
- She caught a bad cold last week.
- There was a bad smell coming from the trash.
学習者向け例文
- I have a bad cold.
- It was a bad day.
- He has a bad leg.
- There was a bad fire.
- She had a bad dream.
adjective
slang
B2
property
5
Impressive or excellent (slang)
Slang: very good or cool.
用法パターン：
[someone/something] is bad
よくある間違い：
Learners may misunderstand slang 'bad' as the opposite of its standard meaning and get confused in context.
類義語
awesome (Informal term meaning impressive or excellent.)
対義語
lame (Slang term meaning unimpressive or uncool.)
コロケーション
He's one bad guitarist
テーマ
slang
|pop culture
|core_vocabulary
例文
- That new car is really bad!
- She's one bad dancer—in the best way possible.
- Man, that concert was bad!
- You think you can beat me? I'm bad!
学習者向け例文
- That song is so bad! (meaning good)
- He is a bad player. (meaning good)
文法
辞書形
bad
IPA
GB/bˈæd/
US/bˈæd/
音節・強勢
bad （1音節）
Stress on 1st syllable (bad)
活用形
Adjective
- Base: bad
- Comparative: worse
- Superlative: worst
関連語
Forms
worse
adjective A2
worst
adjective
Core family
badly
adverb A2
Related words
badness
noun
Negative and opposite forms
good
adjective A1
文法ポイント
- Irregular comparative: worse Adjective
- Irregular superlative: worst Adjective
表現
go from bad to worse
1/ɡˈoʊ fɹˈʌm bˈæd tə wˈɚs/
idiom
Change from poor to worse condition
To become even worse than before.
例文
- The situation went from bad to worse after the storm hit.
- Her health went from bad to worse.
in a bad mood
1/ˈɪn ə bˈæd mˈud/
fixed phrase
Feeling irritable or upset now
Feeling unhappy or angry right now.
例文
- She's in a bad mood today.
- Don't talk to him—he's in a bad mood.
in the worst way (want something) / want something badly (informal variant)
1/ˈɪn ðə wˈɚst wˈeɪ wˈɔnt sˈʌmθɪŋ wˈɔnt sˈʌmθɪŋ bˈædli ɪnfˈɔɹməl vˈɛɹiənt/
fixed phrase
informal
Want something very much (informal)
To want something very much, informally said as 'want badly'.
例文
- I want that job in the worst way.
- He wanted to win badly.
too bad
1/tˈu bˈæd/
fixed phrase
Expression of mild sympathy/regret
Used to say you are sorry something happened, but it cannot be changed.
例文
- It's too bad you missed the party.
- Too bad we can't stay longer.
my bad
1/mˈaɪ bˈæd/
fixed phrase
informal
admitting a mistake
A casual way to say you made a mistake and you are sorry.
例文
- Oops, I sent the wrong file—my bad!
- Oh, I forgot to call you—my bad!
- I forgot to call you back, my bad.
- My bad, I didn’t see your message.