How many letters does the top answer for “(of a trait or condition) failing to serve an adjustive purpose” have?

The most common answer is dysfunctional (13 letters).

Crossword clue: (of a trait or condition) failing to serve an adjustive purpose

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

dysfunctional 13 letters wn-def

(of a trait or condition) failing to serve an adjustive purpose

nonadaptive 11 letters wn-def

(of a trait or condition) failing to serve an adjustive purpose