with little or no sound; free from excitement, trouble, anxiety; gentle

without or with little sound

(of a person, character) slow to express feelings or opinions; (of a seat in a train, room in a hotel etc) kept for a person's later use

silent, unsociable; constrained

in the habit of saying little; not saying all that is known or felt

secretive, quiet

(having the habit of) hiding one's knowledge, feelings etc

uncommunicative

without movement or sound; not having bubbles; (of an action, situation) continuing as in the past; a quiet and calm atmosphere

calm, motionless, quiet

(in the habit of) saying very little

uncommunicative

not communicative

shy, silent