prim

verbs

assume a prim appearance
"They mince and prim"
is a type of (narrower)
undergo a change; become different in essence; losing one's or its original nature
"She changed completely as she grew older"; "The weather changed last night"
contract one's lips
"She primmed her lips after every bite of food"
is a type of (narrower)
squeeze or press together
"she compressed her lips"; "the spasm contracted the muscle"
dress primly

adjectives

affectedly dainty or refined
is derived from
exaggeratedly proper
"my straitlaced Aunt Anna doesn't approve of my miniskirts"
is derived from
is derived from