この箱の内面は滑らかに仕上げてある。

The inside of this box has a smooth finish.

パイプの内面に錆が付着していた。

Rust had built up on the inner surface of the pipe.

容器の内面をコーティングして腐食を防ぐ。

The inside of the container is coated to prevent corrosion.

人を外見ではなく内面で判断するべきだ。

You should judge people by what they're like inside, not by their looks.

この小説は主人公の内面を細やかに描いている。

This novel portrays the protagonist's inner life in fine detail.

彼は内面の葛藤を誰にも打ち明けなかった。

He never told anyone about his inner conflict.

彼は外面はいいが、内面が悪い。

He's charming to outsiders but unpleasant to his own family.

父は内面がよく、家ではいつも穏やかだった。

My father was good-natured with the family and always gentle at home.

結婚してから夫の内面の悪さに気づいた。

After we married, I found out how badly my husband behaves at home.