rest ‧ ful /ˈrestf ə l/ BrE AmE adjective
[ Word Family: noun : ↑ rest , ↑ unrest , ↑ restlessness ; adjective : ↑ restless , ↑ rested , ↑ restful ; adverb : ↑ restlessly , ↑ restfully ; verb : ↑ rest ]
peaceful and quiet, making you feel relaxed:
restful music
—restfully adverb