Middle English sweren

← Old English swerian (inherited)

← Middle Dutch swēren (cognate)

← Proto-Germanic *swarjaną (inherited)

← Middle High German swern (cognate)

← Middle Low German sweren (cognate)

← Old Danish swæriæ (cognate)

← Old Swedish sværia (cognate)

← Proto-West Germanic *swarjan (inherited)

→ English swear (inherited)

→ Middle English forsweren (affix)

→ Middle English swerer (affix)

→ Middle English sweryng (affix)