How many letters does the top answer for “the trait of remaining inactive; a lack of initiative” have?

The most common answer is passiveness (11 letters).

Crossword clue: the trait of remaining inactive; a lack of initiative

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

passiveness 11 letters wn-def

the trait of remaining inactive; a lack of initiative

passivity 9 letters wn-def

the trait of remaining inactive; a lack of initiative