Stepmother
wiktionary
From Middle English stepmoder, from Old English stēopmōdor, from Proto-Germanic *steupamōdēr(“stepmother”), corresponding to step- + mother.
Cognate with Saterland Frisian Stäifmuur(“stepmother”), Dutch stiefmoeder(“stepmother”), German Low German Steevmoder(“stepmother”), German Stiefmutter(“stepmother”), Danish stedmor(“stepmother”), Swedish styvmor(“stepmother”), Icelandic stjúpmóðir(“stepmother”). Compare also West Frisian styfmem(“stepmother”).
etymonline
stepmother (n.)
also step-mother, Old English steopmodor; see step- + mother (n.1). Associated with parsimony and cruelty at least since Middle English.
Is Moder was ded, his fader nam an oþur wijf. ... seint Edward heo louede luyte, for stepmoder is selde guod. ["South English Legendary," c. 1300]
