なのかしら

I wonder if...

→ だ

phrase Rare #22,305

I wonder if... A sentence-ending expression used to wonder aloud or ask oneself something. It is traditionally associated with feminine speech and sounds soft or reflective. It follows nouns and な-adjectives; after verbs and い-adjectives, のかしら is also used.

JA: これは本当に必要なのかしら。

EN: I wonder if this is really necessary.

お父さん留守なのかしら

I wonder if Dad is out.

— 生きる (1952)

なぜなのかしら

I wonder why.

— マルホランド・ドライブ (2001)

なんて美しい夜なのかしら。

What a beautiful night!

なぜ独身なのかしら

I wonder why he's still single.

— ラブ・アクチュアリー (2003)

これって本当に真実なのかしら？

I wonder if this is really true.