堅い

樫は堅い木なので、家具によく使われる。

Oak is a hard wood, so it is often used for furniture.

この木の実は殻が堅くて、なかなか割れない。

This nut has such a hard shell that it won't crack easily.

チームは堅い守りで相手の攻撃をしのいだ。

The team held off the opponent's attacks with a solid defense.

父は定年まで堅い会社に勤めた。

My father worked for a solid, reliable company until retirement.

彼女は口が堅いから、秘密を話しても大丈夫だ。

She can keep a secret, so it's safe to tell her.

彼は無理をせず、堅い商売を続けている。

He runs a steady business without taking risks.

堅い話はこれくらいにして、乾杯しましょう。

Enough of the serious talk. Let's have a toast.

祖父は堅い人で、冗談があまり通じない。

My grandfather is a strait-laced man who doesn't really get jokes.

この論文は文章が堅くて読みにくい。

This paper is written in such a stiff style that it's hard to read.

彼の当選は堅いと見られている。

His election is considered a sure thing.

この調子なら、優勝はまず堅いだろう。

At this rate, the championship is all but certain.

本命の馬を買っておけば堅い。

Betting on the favorite is the safe bet.