uncurl
verb [intransitive, transitive]to become straight, or to make something become straight, after being in a curled position (使由盘卷姿势)伸直;抻直 The snake slowly uncurled. 那条蛇慢慢地伸开了蜷缩的身子。 - uncurl something/itself
The cat uncurled itself and jumped off the wall. 那猫伸直了腰跳下墙头。
Oxford Collocations DictionaryUncurl is used with these nouns as the object:- fist