Welsh gwrth-

← Proto-Celtic *writ- (inherited)

← Welsh wrth (cognate)

← Irish frith- (cognate)

← Scottish Gaelic ri (cognate)

← Cornish gorth- (cognate)

← Latin versus (cognate)

→ Welsh gwrthban (affix)

→ Welsh gwrthod (prefix)

→ Welsh gwrthdaro (affix)

→ Welsh gwrthrych (affix)

→ Welsh gwrthryfel (affix)

→ Welsh gwrthiselydd (prefix)

→ Welsh gwrthiselder (prefix)

→ Welsh gwrthgymdeithasol (affix)

→ Welsh gwrthdystio (affix)

→ Irish le (mention)

→ Irish frith- (mention)

→ Middle Irish fri (mention)

→ Old Irish fri (mention)

→ Old Irish frith- (mention)