childish [ˈtʃaɪldɪʃ]

以下由轻松背单词网站提供

adj.孩子的，孩子气的，幼稚的

typical of a child

The little girl spoke in a high childish voice. 这个小女孩用尖尖的童声讲话。
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。