Forceless

Force´less

Having little or no force; feeble.

These forceless flowers like sturdy trees support me.

- Shak.

Adj.

forceless - lacking force; feeble; "a forceless argument"

Synonyms: unforceful, weak

Antonyms:

forceful - characterized by or full of force or strength (often but not necessarily physical); "a forceful speaker"; "a forceful personality"; "forceful measures"; "a forceful plan for peace"

emasculate, featherweight, feeble, flabby, impotent, inadequate, ineffective, ineffectual, inefficacious, invertebrate, lightweight, no-account, of no account, powerless, soft, spineless, unauthoritative, weak, without any weight