IPA: /ˈprɪɡɪʃnəs/
KK: /ˈprɪgɪʃnɪs/
The quality of being overly concerned with proper behavior and manners, often in a self-righteous or smug way.
Her priggishness made it difficult for her to connect with others who had a more relaxed attitude.
Priggishness is formed from "prig" (originating from the dialectal term meaning to steal or to be a thief, possibly from the Middle English *priggen*, meaning to steal) and the suffix "-ish" (meaning having the quality of) combined with "-ness" (indicating a state or condition). The word describes the state of being overly proper or self-righteously prim, often in a way that suggests a sense of superiority or moralism.
Think of someone who is overly concerned with being proper ('prig') and has a quality of being that way ('-ish'), leading to a state of being overly prim or self-righteous.