弱よわい (yowai)

その 子こは 体からだが 少すこし 弱よわい。

That child has a somewhat weak constitution.

弱い！

He's so weak!

弱っ！

He's so weak!

わさびに弱い。

I have a low tolerance for wasabi.

好きだけど弱いんだ。

I like it, but I'm a lightweight.

シャワーの水圧弱い。

The shower has weak water pressure.

わさび好きだけど弱いんだ。

I like wasabi, but I have a low tolerance to it.

苦手じゃなくて弱いでしょ？

You mean "yowai," not "nigate," right?

体の弱い人が早く死ぬとは限らない。

Frail people do not necessarily die young.

父は体が弱い代わりに意志がとても強い。

My father is physically weak, but (to make up for it) he has a very strong will.

朝が弱いようではこの仕事は無理でしょう。

If it is true that) you have trouble getting up early in the morning (literally: are weak in the morning), you probably won't be able to do this job.

あの子は、体が弱いばかりにクラスメートにいじめられている。

That child is being bullied by his classmates simply because he is (physically) weak.