How many letters does the top answer for “making less susceptible or sensitive to either physical or emotional stimuli” have?

The most common answer is desensitising (13 letters).

Crossword clue: making less susceptible or sensitive to either physical or emotional stimuli

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

desensitising 13 letters wn-def

making less susceptible or sensitive to either physical or emotional stimuli

desensitizing 13 letters wn-def

making less susceptible or sensitive to either physical or emotional stimuli