childish

Trẻ con, thiếu chín chắn

behaving like a child, in an immature or silly way

• be childish

Collocations childish behavior · childish attitude

• He was being very childish about the whole thing.

  Anh ấy đã tỏ ra rất trẻ con về cả chuyện đó.

Thiếu chín chắn, thiếu thực tế

not serious or sensible, like something a child would think of

• be childish

Collocations childish idea · childish suggestion

• It's a very childish way of thinking.

  Đó là một cách nghĩ rất thiếu chín chắn.