abortive, anticlimactic, barren, bootless, defeasible, feckless, feeble, forceless, fruitless, futile, idle, impotent, inadequate, incompetent, indecisive, inefficacious, inefficient, inept, inferior, innocuous, inoperative, invertebrate, lame, limited, neutralized, nugatory, null, null and void, paltry, powerless, spineless, unable, unavailing, unfruitful, unproductive, unprofitable, unsuccessful, vain, void, withered, worthless
effective nor ineffective
Ironically, this question.
If you mean "ineffective", that means it's not effective.
affective means that it has an effect on your body or it makes you cause reaction. ineffective means the opposite
futile, vain, idle, useless, worthless, valueless, pointless, ineffective, ineffectual, unprofitable, unrewarding
Some words that mean like:Fond ofFavorresembleakin to
Words meaning to cancel or make ineffective are void, revoke, annul, counteract, offset, invalidate...
effective means-something positive can happen ineffective means-something negative can happen
not producing any effect -not going anywhere
It depends on what you mean. If you mean the most ineffective caliber, it's probably the .25 ACP or the .22 short. Some .25 cartridges have less energy than some .22 shorts.
Ineffective
When someone in the army made a plan and said its effective immediately they are saying they should do it right then and there. Then after someone gave that order if they decide not to do it it was ineffective.