安静

quiet; calm; peaceful; tranquil; silent; still; undisturbed; serene; noiseless; hushed; restful; quietly; silently; peacefully; calmly; piano; quiet down; quieten down; hush down; settle down; pipe down; lull; tranquilize; quietness; tranquility; silence; peace; stillness; serenity; quietude; hush; in silence; [music]p. (short for piano, used as an instruction for telling you to play or sing quietly)

沉默

silent; mum; taciturn; reticent; uncommunicative; mute; quiet; still; soundless; voiceless; wordless; remain silent; keep quiet; say nothing; hold one's tongue; silence; reticence; taciturnity; muteness