calm, tranquility, silence, (inner) peace, rest / cosiness

tranquil, calmly, silently, quietly, composedly, modestly, peacefully / laid (back), idly (resting, laid back, recumbent position) / cosily (Being in a peaceful and unbothered condition/position. Showing/feeling lack of concern) / well, good (position/codition) / not moving, still / quiet(ly), calm(ly)