i 1 n 1 c 3 o 1 n 1 c 3 e 1 i 1 v 4 a 1 b 3 i 1 l 1 i 1 t 1 y 4
16 letters · 28 points in Scrabble
Meaning
noun the state of being impossible to conceive
originFrom inconceivable + -ity or in- + conceivability.
Etymology from Wiktionary, CC BY-SA 3.0