ill-tempered

/IH1 L T EH0 M P ER0 D/
adjective
  1. 1

    Of or pertaining to bad temper; showing anger easily or customarily.

    โ€œHis bad-tempered outburst caught his friends by surprise.โ€

Source: https://en.wiktionary.org/wiki/bad-tempered, https://en.wiktionary.org/wiki/ill-tempered