口くちが裂さけても

expression

no matter what; wouldn't say it even if my mouth were torn apart

Used with a negative sentence to emphasize that one would never say or reveal something, no matter what. Often followed by 言えない or similar negative verbs.

See also: 口が裂けても言えない

• 口くちが裂さけても本ほん当とうのことは言いえない。

  I wouldn't tell the truth no matter what.

• 口くちが裂さけても彼かれの秘ひ密みつはばらせない。

  I could never reveal his secret, no matter what.