You searched for: “incogitability
incogitability (s) (noun) (no pl)
The character of being unthinkable; the incapability of being thought: The tragic accident of Jenifer's mother produced an incogitability and powerlessness for Jenifer even to envisage and turn it over in her mind.
This entry is located in the following units: -ability (page 5) ag-, agen-, act-, agi-, agit- (page 10)