Find the synonyms or antonyms of a word
Antonyms for in efficacious
| Grammar : Adj |
| Spell : in-ef-i-key-shuh s |
| Phonetic Transcription : ˌɪn ɛf ɪˈkeɪ ʃəs |
- able
- adequate
- believable
- capable
- competent
- consequential
- dexterous
- effective
- effectual
- efficient
- expert
- filled
- fit
- fruitful
- full
- good
- important
- logical
- modest
- neat
- possible
- potent
- powerful
- practicable
- practical
- probable
- productive
- profitable
- qualified
- rational
- realistic
- reasonable
- sensible
- shy
- significant
- skillful
- sound
- strong
- successful
- sufficient
- talented
- tenable
- tidy
- true
- useful
- valid
- valuable
- viable
- wise
- worthwhile
- worthy
Definition of in efficacious
Origin :- 1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).
- As in ineffective/ineffectual : adj weak, useless
- As in inefficient : adj not working well; wasteful
- As in null : adj ineffectual, valueless
- As in unable : adj not having talent, skill
- As in vain : adj futile, useless
- As in impractical : adj unrealistic
- As in ineffective : adj useless
- As in inefficacious : adj ineffectual
- As in unnegotiable : adj impracticable
- As in unusable : adj impracticable
- As in unworkable : adj impracticable
- As in unworkmanlike : adj inefficient
- As in impractical/impracticable : adj unrealistic
Synonyms for in efficacious
- abortive
- absent
- abstract
- absurd
- anticlimactic
- bad
- barren
- bootless
- can't cut it
- can't hack it
- can't make the grade
- careless
- characterless
- chimerical
- clumsy
- defeasible
- delusive
- delusory
- disorganized
- emasculate
- empty
- extravagant
- faulty
- feckless
- feeble
- forceless
- frivolous
- fruitless
- futile
- going nowhere
- half-baked
- helpless
- hog-tied
- hollow
- idealistic
- idle
- illogical
- imaginary
- impossible
- impotent
- impracticable
- impractical
- improbable
- improficient
- improvident
- impuissant
- in vicious circle
- inadequate
- inapplicable
- inapt
- incapable
- incapacitated
- incompetent
- indecisive
- ineffective
- ineffectual
- inefficacious
- inefficient
- inept
- inexpert
- infeasible
- inferior
- innocuous
- inoperable
- inoperative
- insignificant
- invalid
- invertebrate
- irrealizable
- ivory-tower
- lame
- limited
- misleading
- negative
- neutralized
- no can do
- no go
- no good
- no way
- no-go
- no-win
- nonexistent
- nonfunctional
- nonviable
- not a prayer
- not able
- not cut out for
- not effective
- not equal to
- not up to
- nothing
- nugatory
- null
- null and void
- on a treadmill
- otherworldly
- otiose
- out of commission
- out of the question
- paltry
- petty
- pointless
- powerless
- prodigal
- profitless
- puny
- quixotic
- romantic
- senseless
- shooting blanks
- shuck
- sidelined
- slack
- slack-spined
- slight
- slipshod
- sloppy
- slovenly
- speculative
- spineless
- starry-eyed
- sterile
- theoretical
- time-wasting
- trifling
- trivial
- unable
- unattainable
- unavailable
- unavailing
- unbusinesslike
- unfeasible
- unfit
- unfitted
- unfruitful
- unimportant
- unnegotiable
- unnotable
- unprepared
- unproductive
- unprofitable
- unqualified
- unreal
- unsanctioned
- unserviceable
- unskilled
- unskillful
- unsuccessful
- untrained
- unusable
- unwise
- unworkable
- useless
- vain
- valueless
- visionary
- void
- weak
- wild
- withered
- won't fly
- worthless
Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019