Synonyms of inapprehensible

1 Syllable
rare
2 Syllables
doubtful
3 Syllables
singular, fantastic, unique, uncommon, unheard-of
4 Syllables
unthinkable, unknowable, impossible, ineffable, exceptional, improbable, incredible
5 Syllables
unordinary, incogitable, extraordinary, indescribable, inconceivable, unbelievable
6 Syllables
unimaginable, incomprehensible