泣くの

crying?, crying

→ 泣く
phrase Uncommon #9,052
crying? As a sentence-ending phrase, の makes a question sound explanatory or seeking confirmation. The verb changes form as needed, as in 泣いたの? (Did you cry?) and 泣いてるの? (Are you crying?).
JA: どうして泣くの?
EN: Why are you crying?

さあお互い抱き合って思い切り泣くの

Come on, let’s hold each other and cry our hearts out.

— ファイト・クラブ (1999)

トムってよく泣くの

Does Tom cry a lot?

お父さん何で泣くの

Dad, why are you crying?

— タクシー運転手 約束は海を越えて (2017)

なぜお前が泣くの

Why are you crying?

— 紅夢 (1991)

なぜ泣くの

Why are you crying?

— 鏡 (1975)

私が死んだらだれが泣くの

When I die, who will cry?

赤ちゃんはお腹がすく泣くの

Babies cry when they're hungry.

まさか泣くの

No way, are you going to cry?

— ANORA アノーラ (2024)

phrase Uncommon #10,141
crying の nominalizes 泣く, turning “to cry” into “crying.” In expressions such as 泣くのか and 泣くのかな, it can instead be part of an explanatory question meaning “will you/he cry?”
JA: 人前で泣くのは恥ずかしい。
EN: Crying in front of people is embarrassing.

ジェーン声を出して泣くのを抑えることができなかった

Jane couldn't hold back her sobs.

不運を招くから泣くのやめろ

Stop crying—it’ll bring bad luck!

— 親切なクムジャさん (2005)

タオル泣くのを見て嬉しかった

I was happy to see the towel cry.

— 恋する惑星 (1994)

これが私に不幸をもたらすんだ泣くのやめろ

This is going to bring me misfortune. Stop crying!

— 親切なクムジャさん (2005)

泣くのよせよ

Don't cry.

僕が言ったことその日泣くのお前

What I said—you're the one who'll cry that day.

— きっと、うまくいく (2009)

彼があんな風に泣くのを見るのは堪えられない

I can't bear to see him cry like that.