Old English cildisc "proper to a child;" see child + -ish. Meaning "puerile, immature, like a child" in a bad sense is from early 15c. Related: Childishly; childishness.
实用例句
1. She's just being childish and immature.
她在耍小孩子脾气，真是任性。
来自柯林斯例句
2. Don't be so childish!
别那么幼稚！
来自《权威词典》
3. We eventually ran out of patience with his childish behaviour.
我们终于对他幼稚的行为忍无可忍.
来自《简明英汉词典》
4. A childish idea like that can be amusedly tolerated.
像那样幼稚的想法可以一笑置之.
来自《简明英汉词典》
5. You would be laughed out of court with such a childish question.
