一いち分ぶの隙すきもない

expression, i-adjective

without any weak spot; watertight; impeccable

Idiomatic expression describing something flawless, leaving no room for criticism or attack. Often used for arguments, plans, security, or performance.

• 彼かれの弁べん護ごは一いち分ぶの隙すきもない完かん璧ぺきなものだった。

  His defense was flawless, without any weak spot.

• このセキュリティシステムは一いち分ぶの隙すきもない。

  This security system is watertight.