pronoun, adverb, verb, idiom, adjective, particle · self; oneself; by oneself

他是一个非常自律的人。

preposition, adverb · from; since; starting from

他自幼就开始学习钢琴。

adverb · naturally; as a matter of course; of course

只要坚持下去，成功自会到来。

idiom, pronoun, adverb, verb · prefix or particle indicating the action is reflexive or done to oneself

这种行为简直是自欺欺人。