Middle English groynen

← Old English grunnian (inherited)

← Middle English groyn (affix)

← Middle English -en (affix)

← Old French groignier (borrowed)

← Old French grougnier (mention)

← Proto-Germanic *grunnōną (inherited)

← Latin grunniō (derived)

→ English groin (inherited)

→ Middle English gurnard (affix)

→ Middle English groynynge (affix)

→ Middle English grunten (affix)