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" Spot the Vocabulary Trap in Every Question Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable