信じてない

don't believe, doesn't believe, don't trust, doesn't trust

→ 信じる
信じ believe, trust + Te-form (conjunctive) + ない Negative
verb · present indicative Uncommon #14,233
don't believe, doesn't believe, don't trust, doesn't trust Informal negative form of 信じている, meaning “not believing” or “not trusting.” The subject is determined by context.
JA: 私は彼の話を信じてない。
EN: I don't believe what he says.
Conjugation of 信じる
Indicative present
信じてる信じてない信じます

トムの言うことなんてほとんど信じてない

I hardly believe anything Tom says.

私のこと信じてない

Don't you trust me?

催眠術信じてないんだ

I don't believe in hypnosis.

信じてないでしょ

You don't believe me, do you?

— プラットフォーム (2019)

信じてない

Don't you believe me?

俺は売人信じてないのに信じたいと思うようになる

I don't trust dealers, yet I find myself wanting to.

— レザボア・ドッグス (1992)

天気予報信じてない

Don't you believe the weather forecast?

僕の友達は幽霊存在なんて信じてない

My friend doesn't believe in ghosts.

トムメアリー運転免許を取得したことを信じてないと言っていた

Tom said he didn't believe that Mary had gotten her driver's license.

信じてないだろ

You don't believe me, do you?

— Good Luck, Have Fun, Don't Die (2026)

どうして信じてない

Why don't you believe me?

トムメアリー信じてないってさ

Tom and Mary say they don't believe it.

俺はおまえを信じてない言うべき

Should I say, “I don’t trust you”?

— レザボア・ドッグス (1992)

彼女は僕を信じてない

She doesn't trust me.

— 甘い生活 (1960)

信じてないのか

Don’t you believe me?

— 預言者 (2009)

彼の言うことなんて頭から信じてない

I don't believe a word he says.