ineffective adj.

VERBS be, prove, seem These policies have proved ineffective. | become | make sth, render sth The contract was rendered ineffective by this careless wording.

ADV. highly, singularly, very | completely, entirely, totally, wholly | largely | pretty, rather, relatively, somewhat | apparently | politically

PREP. against These weapons are totally ineffective against tanks. | in chemicals that are very ineffective in killing weeds