Antonyms of adj good-tempered

1 sense of good-tempered

Sense 1
equable, even-tempered, good-tempered, placid -- (not easily irritated; "an equable temper"; "not everyone shared his placid temperament"; "remained placid despite the repeated delays")

INDIRECT (VIA good-natured) -> ill-natured -- (having an irritable and unpleasant disposition)

Similarity of adj good-tempered

1 sense of good-tempered

Sense 1
equable, even-tempered, good-tempered, placid -- (not easily irritated; "an equable temper"; "not everyone shared his placid temperament"; "remained placid despite the repeated delays")
       => good-natured (vs. ill-natured) -- (having an easygoing and cheerful disposition; "too good-natured to resent a little criticism"; "the good-natured policeman on our block"; "the sounds of good-natured play")