Antonyms of adj quick-tempered

1 sense of quick-tempered

Sense 1
choleric, irascible, hotheaded, hot-tempered, quick-tempered, short-tempered -- (quickly aroused to anger; "a hotheaded commander")

INDIRECT (VIA ill-natured) -> good-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")

Similarity of adj quick-tempered

1 sense of quick-tempered

Sense 1
choleric, irascible, hotheaded, hot-tempered, quick-tempered, short-tempered -- (quickly aroused to anger; "a hotheaded commander")
       => ill-natured (vs. good-natured) -- (having an irritable and unpleasant disposition)