irregular [ɪˈregjələ(r)]

以下由轻松背单词网站提供

n.不合规格之物；adj.不规则的，不整齐的，不合法的

(of behaviour or actions ) not according to usual rules or what is expected

English spelling is very irregular. 英文的拼法很不规则。
This is a irregular verb. 这是一个不规则动词。