How many letters does the top answer for “make insensitive or callous; deaden feelings or morals” have?

The most common answer is cauterise (9 letters).

Crossword clue: make insensitive or callous; deaden feelings or morals

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

cauterise 9 letters wn-def

make insensitive or callous; deaden feelings or morals

cauterize 9 letters wn-def

make insensitive or callous; deaden feelings or morals