Frolic
early 16th century (as an adjective): from Dutch vrolijk ‘merry, cheerful’.
wiktionary
From Dutch vrolijk(“cheerful”), from Middle Dutch vrolijc, from Old Dutch frōlīk, from Proto-Germanic *frawalīkaz. Compare German fröhlich(“blitheful, gaily, happy, merry”).
The first element, ultimately from Proto-Germanic *frawaz, is cognate with Middle English frow(“hasty”); the latter element, ultimately from *-līkaz, is cognate with -ly, -like.
etymonline
frolic (v.)
"make merry, have fun, romp playfully," 1580s, from frolic (adj.) "joyous, merry, full of mirth" (1530s), from Middle Dutch vrolyc "happy," a compound of vro- "merry, glad" + lyc "like" (see like (adj.)). The first part of the compound is cognate with Old Norse frar "swift," Middle English frow "hasty," from PIE *preu- "to hop" (see frog (n.1)), giving the whole an etymological sense akin to "jumping for joy." Similar formation in German fröhlich "happy." Related: Frolicked; frolicking. As a noun from 1610s.
