adverb, adjective, pronoun, verb, particle · to a greater degree or extent; even more

今天的天气比昨天更热。

verb · to change, replace, or substitute

为了掩盖真实身份，他不得不数更其名。

idiom · to experience or go through

他毕竟少不更事，处理这类问题缺乏经验。

punctuation · one of the five two-hour periods of the night or a sentry's watch

半夜三更，外面突然传来了敲门声。