口で

with one's mouth

→ 口

phrase Uncommon #16,448

with one's mouth Uses で to indicate the means or method. Depending on context, it can mean “through the mouth” or emphasize saying something oneself rather than having someone else say it.

JA: 鼻ではなく、口でゆっくり息をして。

EN: Breathe slowly through your mouth, not your nose.

口で言うのは簡単だ。

It's easy to say.

実行するより口で言うほうが容易だ。

It's easier to talk about doing it than to actually do it.

口でか？

With your mouth?

— ブエノスアイレス (1997)

口で言えば分かる

You'll understand if I explain it verbally.

— ストーカー (1979)

悪魔がお前の口でしゃべるのか？

Is the devil speaking through your mouth?

— ウィッチ (2016)

口で言うのは実行するのよりやさしい。

It's easier to talk about doing something than to actually do it.

その絵は口で言い表せないほど美しい。

The painting is indescribably beautiful.

私達は口で食べる。

We eat with our mouths.

口で言うほど簡単じゃない。

It’s not as easy as it sounds.

口では大阪の城も建つ。

With words alone, you can build castles in the air.