Where does “roun” come from?

roun (Middle English) comes from Old English rūn, from Proto-West Germanic rūnu, from Proto-Germanic rūnō, from Proto-Celtic rūnā — secret, mystery.

Ancestry of “roun”, step by step

Step	Language	Word	Meaning
1	Old English	rūn	letter, rune; whisper, secret, mystery; secret,...
2	Proto-West Germanic	rūnu	secret, mystery; rune, letter
3	Proto-Germanic	rūnō	secret, mystery; rune
4	Proto-Celtic	rūnā	secret, mystery

roun — Etymology, Origin & Word History | Etymology Explorer