resistless

adjectives

impossible to resist; overpowering
"irresistible (or resistless) impulses"; "what happens when an irresistible force meets an immovable object?"
irresistible, resistless
offering no resistance
"resistless hostages"; "No other colony showed such supine, selfish helplessness in allowing her own border citizens to be mercilessly harried"- Theodore Roosevelt
resistless, supine, unresisting