IPA: /ˈstreɪtˌleɪst/
KK: /ˈstreɪtˌleɪst/
Someone who is very strict about how people should behave, especially regarding morals and manners.
Her straitlaced attitude made it difficult for her to enjoy the party.
Straitlaced is formed from "strait" (from Old English *streht*, meaning narrow or tight) and "laced" (from the verb "lace", meaning to fasten or tie). The word describes someone who is tightly bound by strict moral or social rules, hence the connotation of being narrow-minded or overly strict.
Think of being 'narrow' ('strait') and 'tied up' ('laced') by strict rules — that's why straitlaced describes someone who is very strict or rigid in their beliefs.
No commonly confused words.