言ってくれないの

won't you tell me?

→ 言う
phrase Rare #33,186
won't you tell me? A casual, sometimes plaintive or reproachful way to ask why someone will not tell or say something. The final の adds an explanatory or emotional tone.
JA: どうして本当のことを言ってくれないの?
EN: Why won't you tell me the truth?

でもまだ本当のこと言ってくれないの

But you're still not telling me the truth.

— 罪人たち (2025)

誰もお祝い言ってくれないの

Isn't anyone going to congratulate me?

— さらば、わが愛/覇王別姫 (1993)

なんでそれを言ってくれないの

Why won't you tell me that?

— 罪人たち (2025)

何か言ってくれないの?

Aren’t you going to say something?

— Carandiru (2003)

どうして言ってくれないの

Why won’t you tell me?