a. 不能抵抗的, 无抵抗力的

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.