ᴹ√ROY¹ root. “chase”
A root in The Etymologies of the 1930s glossed “chase” with derivatives like ᴹQ. roime/N. rhui(w) “hunt, hunting” and ᴹQ. ronyo/N. rhŷn(w) “chaser, hound of chase” (Ety/ROY¹; EtyAC/ROY¹); the root was originally given as ᴹ√RUY (EtyAC/ROY¹).
References ✧ Ety/ROY¹; EtyAC/ROY¹