godan verb (-mu), intransitive verb
show anger; get visibly angry
Describes someone's face or manner showing anger or irritation. Often used when a person's expression or tone betrays their anger.
彼はその言葉に気色ばんだ。
He showed his anger at those words.
気色ばんだ声で反論した。
He argued back in an angry tone.
Compound of 気色 (けしき, 'look, expression') and the suffix ばむ ('to show signs of, to appear'). The exact historical derivation is uncertain, but the word has been used since classical Japanese.