Re·sist·less, a.
  1. Having no power to resist; making no opposition. [Obs. or R.]
  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.
  ◄ ►