- irresistible, resistless - impossible to resist; overpowering; "irresistible (or resistless) impulses"; "what happens when an irresistible force meets an immovable object?"
- resistless, supine, unresisting - 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
Antonym: active (indirect, via passive)