A baby or infant; a term of endearment for a very young child, commonly used in everyday speech.
赤ちゃんが夜中に泣いて、よく眠れなかった。
The baby cried during the night, so I couldn't sleep well.
赤ちゃん用のミルクを買いに行く。
I'm going to buy formula for the baby.
公園で赤ちゃんを連れた親子をよく見かける。
I often see parents with babies at the park.
初めての赤ちゃんで育児に不安がある。
I have worries about childcare with my first baby.