To grumble or complain; to mutter one's dissatisfaction or gripe about something.
彼はいつも仕事のことでぼやいている。
He is always complaining about work.
遅刻したことで先生にぼやかれた。
The teacher grumbled at me for being late.
寒くて、皆がぼやき始めた。
It was cold and everyone started to complain.