unefficacious
nonefficacious
inefficacious
noneffective
undereffective
unfulfillable
uneffigiated
unsaturable
unpersuasible
nonirrevocable
unpracticable
unoptimizable
nonoptimizable
unaccommodable
nonexpendable
unexpendable
uncomplaisant
unexpeditious
unsolidifiable
unputrefiable
uncompensable
nonrestitutable
nonfulfilling
unrestitutable
unaffable
improductively
unaffrontable
nonapportionable
uncheesable
nonproximate
unabatable
undersatisfied
unexpedited
unconsolable
nonratable
nonapposable
nonpractical
nonconvenable
unreplenishable
nonreplenishable
unusable
inapproachable
nonusable
nonexcusable
nonrationalizable
unrectifiable
nonrectifiable
nonerodable
unrationalizable
nonutile
unerodable
unratifiable
unaccommodating
nonaccommodative
nonredeemable
undefinable
unexpropriable
uningenious
undependable
uningenuous
unaccommodative
nonretraceable
nonfulfilled
unjusticiable
nonappreciable
open
nonefficient
unresultful
unsatisfiable
unrelievable
inappropriable
unoptimized
unqualifiable
nonoptimized
unappropriable
unconcretizable
noniterable
nonpersuasive
unkeepable
nonprovable
inconstruable
unconstruable
nonconstruable
unfortifiable
nonassimilable
unflatterable
unlicentious
nonsmoothly
nonsuccessful
unindictable
noncommensurable
unadmirable
nonpurchasable
nonsurvivable
nonindictable
unostensible
ungradable
unequable
unbeneficent
unutilizable

English words for 'Not efficacious.'

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