Resistless \Re*sist"less\, a. 1. Having no power to resist; making no opposition. [Obs. or R.] --Spenser. 2. Incapable of being resisted; irresistible. Masters' commands come with a power resistless To such as owe them absolute subjection. --Milton. -- {Re*sist"less*ly}, adv. -- {Re*sist"less*ness}, n.