quies-, -quiet-, -quit-

1. To consent or comply passively or without protest: "He acquiesced to his wife's request that he put the laundry into the washing machine."
2. To agree or comply with something in a passive or reserved way: "She decided to acquiesce to the pleading of her child for another piece of cake."

1. Artfully or affectedly shy or reserved; slyly hesitant; coquettish.
2. Shy, modest, or reserved in social situations.
3. Showing reluctance; especially, when insincere or affected, to reveal one's plans or opinions, to make a commitment, or to take a stand.
4. Etymology: from Old French coi, earlier quei. "quiet, still", ultimately from Latin quietus, "resting, at rest".