to do something that is considered unacceptable
受け入れられないと考えられることをする (ukeirarenai to kangaeraru koto o suru)
"He crossed the line when he insulted her in front of everyone."
"彼は皆の前で彼女を侮辱した時、一線を越えた。" (kare wa mina no mae de kanojo o bujoku shita toki, issen o koeta)
to take revenge on someone for something they did
to act unfairly or say something hurtful
a phrase used in a non-literal way for effect or emphasis
to remain loyal to someone or something
information that is incomplete or unclear
to fail to do what one promised
