How many letters does the top answer for “the state of being infeasible; impracticability.” have?

The most common answer is infeasibility (13 letters).

Crossword clue: the state of being infeasible; impracticability.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

infeasibility 13 letters web-def

the quality of not being doable