baby talk

US /ˈbeɪ.bi ˌtɔːk/
UK /ˈbeɪ.bi ˌtɔːk/
"baby talk" picture
1.

幼児語, 赤ちゃん言葉

a simplified type of speech used by adults when talking to young children, or by young children learning to speak

:
She used baby talk when speaking to her newborn niece.
彼女は生まれたばかりの姪に話しかけるとき、幼児語を使った。
The toddler's baby talk was adorable.
幼児の幼児語は可愛らしかった。