プログレッシブ和英中辞典(第4版)の解説
きんもつ【禁物】
酒はここでは絶対禁物です
You are strictly forbidden to drink here./Drinking is strictly forbidden [prohibited] here.
その言葉はここでは禁物になっている
That word is taboo here.
夜ふかしは子供には禁物です
It is bad for children to stay up late.
あの男に油断は禁物だ
We must never relax our guard against him.
胃かいように酒は絶対禁物だ
A person with a stomach ulcer 「simply must not drink [《口》 should avoid alcohol like the plague].