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逃がさない

won’t let (someone) escape, don’t let (someone) get away

→ 逃がす
逃がさ let (someone or something) escape, release + ない Negation
verb · informal Rare #28,767
won’t let (someone) escape, don’t let (someone) get away Negative form of 逃がす; the exact English wording depends on context.
JA: 今度は犯人を逃がさない。
EN: I won’t let the culprit get away this time.
Conjugation of 逃がす
Indicative
逃がさない

逃がさない!

I won't let you get away!

— Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020)

今度こそは彼女を逃がさないぞ。

This time, I won't let her get away.

逃がさない

I won't let you get away.

— 自転車泥棒 (1948)

でも絶対に逃がさない

But I’ll never let you get away.

— The Garden of Sinners: Paradox Spiral (2008)

逃がさないように気をつけてね

Be careful not to let it get away.

— 魔女の宅急便 (1989)

もう逃がさない

I won't let you escape again.

— TAXi (1998)

絶対に逃がさない

I’ll never let you get away.

— 自転車泥棒 (1948)