IPA: /ˈlɛtʃərəsnəs/
KK: /ˈlɛtʃərəsnəs/
The quality or state of being excessively interested in sexual activity or desire.
His lecherousness was evident in the way he spoke to women.
Lecherousness → It is formed from "lecher" (from Old French *lecher*, meaning one who indulges in lust) and the suffix "-ous" (meaning full of) combined with "-ness" (indicating a state or quality). The word "lecherousness" refers to the state of being full of lechery or excessive sexual desire.
Think of someone who is 'full of' ('-ous') lustful behavior ('lecher') — that's why lecherousness means the quality of being excessively lustful.