なあに

what?

→ 何
interjection Rare #35,559
what? A casual, often gentle or playful way to say 「何?」; also used when asking someone to repeat themselves.
JA: なあに?よく聞こえなかった。
EN: What? I couldn't hear you well.

なあにこれこれでお城なの

What is this? This is supposed to be a castle?

— ハウルの動く城 (2004)

なあに

What?

— ソング・オブ・ザ・シー 海のうた (2014)

母親なあに

(Mother) What is it?

— 魔女の宅急便 (1989)

なあに

What is it?

— キャッチ・ミー・イフ・ユー・キャン (2002)

なあにその椅子

What's with that chair?