IPA: /ˈluːdnəs/
KK: /ludnɪs/
The quality or state of being sexually inappropriate or offensive.
The film was criticized for its lewdness and explicit content.
Lewdness → It is formed from "lewd" (from Old English *lewd*, meaning unlearned or ignorant) and the suffix "-ness" (meaning the state or quality of). The word "lewdness" refers to the state of being lewd, which has come to mean indecent or sexually unrestrained behavior.
Think of 'lewd' meaning unlearned or ignorant, and remember that 'lewdness' refers to the state of being indecent or sexually unrestrained.