prim

"To impress the teachers, Sarah primmed her answers, making them sound overly correct and formal. "

"Before the school dance, Sarah primped her hair and put on her best dress. "

"My sister is very prim and proper; she always wears a dress and cardigan to school, even on warm days. "

"prim regularity; a prim person"

"The prim was carefully trimmed to form a neat hedge around the garden. "