SAT GRE TOEFL inconceivable Definition Impossible to imagine or believe. Example "The idea that humans could live on Mars is still inconceivable to many." Sign in to save SAT Quiz → GRE Quiz → TOEFL Quiz → ← incomprehensible inconclusive → Study tips featuring "inconceivable" Map Each Word Into a Connected Network Map the Author's Attitude Before Reading Questions Force Contrast Between Two Similar Words Related words SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal