禁句きんく (kinku)

その 言葉ことばは 禁句きんくです

That word is a swear word.

これが大正9年（1920年）1月の「商社設立禁止宣言」であり、戦後、商社が開設されるまで、住友では商社開設が禁句になってしまった。

That was the 'Declaration of Prohibition on Establishing Trading Company' of January, 1920, and since then nobody had said about establishment of trading company as taboo until a actual trading company of Sumitomo was opened after the World War II.

彼に髪のことを話してはいけない. それは禁句だ. Don't talk to him about his hair—it's a taboo subject.ぼくはといえば、もはや化学の研究に目を向けなくなり、科学は我が家の禁句となった。

As for myself, I no longer care for chemical research, and science is a tabooed topic in my household.