D defs.my
Entry 2 senses Webster, 1913

Resistless

· Re·sist·less · IPA /ɹəˈzɪstləs/
01 a. Having no power to resist; making no opposition.
  1. 1.
    Having no power to resist; making no opposition.[Obs. or R.]
  2. 2.
    Incapable of being resisted; irresistible.
    “Masters' commands come with a power resistless To such as owe them absolute subjection.” Milton.