Definitions

inefficacious

[in-ef-i-key-shuhs] / ˌɪn ɛf ɪˈkeɪ ʃəs /

ADJECTIVE

ineffectual

Synonyms

WEAK

abortive anticlimactic barren bootless defeasible feckless feeble forceless fruitless futile idle impotent inadequate incompetent indecisive ineffective inefficient inept inferior innocuous inoperative invertebrate lame limited neutralized nugatory null null and void paltry powerless spineless unable unavailing unfruitful unproductive unprofitable unsuccessful useless vain void withered worthless