be
become, fall, go, grow
keep, lie, remain, sit, stay
Just sit quiet for a moment, there's a good boy.

keep sb/sth
Keep that dog quiet, will you!

extremely, fairly, very, etc.
all
Suddenly the room went all quiet.

awfully, remarkably, unusually
Everyone went awfully quiet.

absolutely, completely, perfectly
deathly, eerily
The house was eerily quiet.

dangerously
His voice was dangerously quiet as he asked the question.

oddly, strangely, unnaturally
She went back to a strangely quiet house.

surprisingly, uncharacteristically

about
I knew I had to keep quiet about it.

nice (and) quiet
I was looking forward to a nice quiet afternoon.

be, look, seem
become
lie, remain, sit
Lie quiet for an hour and you'll feel better.

keep sb/sth
Keep the patient as quiet as possible.

extremely, fairly, very, etc.
reasonably (esp. BrE), relatively
enough
Things seemed quiet enough, but it was an uneasy calm.

Quiet is used with these nouns:
amusement, assurance, celebration, ceremony, charm, chat, chuckle, click, confidence, confines, contemplation, contentment, conversation, corner, countryside, day, desperation, determination, dignity, dinner, diplomacy, drink, enjoyment, evening, existence, groan, knock, lane, laughter, life, man, manner, meditation, menace, moan, moment, morning, murmur, music, neighbourhood, night, passage, place, pleasure, prayer, read, reflection, resignation, retreat, revolution, road, room, satisfaction, seclusion, serenity, sigh, sob, solitude, spell, spot, street, suburb, surroundings, tone, trading, type, village, voice, week, whisper, word