Restful
来自Big Physics
Old English ræst, rest (noun), ræstan, restan (verb), of Germanic origin, from a root meaning ‘league’ or ‘mile’ (referring to a distance after which one rests).
wiktionary
From Middle English restful, restfulle, equivalent to rest + -ful.
etymonline
restful (adj.)
mid-14c., "characterized by or conducive to rest, characteristic of a contemplative life;" late 14c., "quiet, peaceful, tranquil;" from rest (n.1) + -ful. Related: Restfully; restfulness.