固い

hard; tough, stubborn; inflexible

固 hard; tough + い adjective-forming; having the quality of
adjective · present tense Rare #29,326
hard; tough Describes something that resists pressure; food can be tough or chewy.
JA: この肉は固いですね。
EN: This meat is tough, isn’t it?
Forms of 固い
固い固く

固いものは食べないでください。

Please don't eat anything hard.

固いね

You're stiff.

— ムーンライズ・キングダム (2012)

壁は固いコンクリートこれが役に立つのは…

The wall is solid concrete. This will come in handy when...

— ファイト・クラブ (1999)

固い芯だ

It has a hard core.

— ミッション・クレオパトラ (2002)

このステーキは靴の皮と同じ位固い。

This steak is as tough as shoe leather.

この肉は固いですね。

This meat is tough.

adjective · present tense Rare #32,999
stubborn; inflexible Describes someone who won’t change their way of thinking; often used in 頭が固い.
JA: 彼は頭が固い。
EN: He’s stubborn and inflexible in his thinking.
Forms of 固い
固い固く

僕たちの先生って本当に頭が固いよね。

Our teacher is really set in their ways, aren't they?

彼は頭が固い。

He's set in his ways.

頭の固いやつだな。

You're so stubborn.

そういうこと言うから頭固いって言われるんだよ。

That’s exactly why people say you’re so narrow-minded.

頭の固い老人に新しい考え方を教える。

Teach a set-in-his-ways old man to think differently.

トムは頭が固い。

Tom is set in his ways.