prudish
pru-dish
adjective
Easily shocked by matters relating to sex, nudity, or perceived impropriety.
"She was too prudish to discuss the topic."
Thesaurus
Synonyms: victorian, prim, square-toed, strait-laced, proper, tight-laced, straitlaced, straight-laced, puritanical, straightlaced, priggish, prissy