sudden
词形变化：
副词: suddenly | 名词: suddenness |
同义词：
abrupt | unexpected | hasty | impulsive | impetuous | unforeseen | instant | immediate | momentary | curt | surprising | headlong | summary | rapid | swift | quick | speedy | precipitous | fast |
反义词：
gradual |
词义辨析：
同义:
a.突然的; 意外的; 快的
unexpected
hasty
abrupt
instant
immediate
impulsive
unforeseen
impetuous
同义参见:
momentary
curt
surprising
summary
headlong
fast1
反义:
a.突然的; 意外的; 快的
gradual
deliberate
unhurried