Rhig, n. a notch, a groove; the pillory
Rhign, n. a notch, a groove
Rhignedd, n. a notched part
Rhigo, v. to notch, to groove
Rhigod, n. a pillory
Rhigol, n. a groove; trench
Rhigoliad, n. a grooving; a trenching
Rhigolydd, n. groove plane
Rhilgwm, n. a long row; rote
Rhigymu, v. to say by rote