IPA: /ˈstɛpˌmʌðər/
KK: /ˈstɛpˌmʌðər/
A woman who is married to someone's father but is not their biological mother.
After her father remarried, she had a stepmother who was very kind to her.
Stepmother → It is formed from "step" (from Old English *stæpe*, meaning a step or degree) and "mother" (from Old English *modor*, meaning a female parent). The word "stepmother" refers to a woman who is a mother by marriage rather than by birth, indicating a familial relationship that is a step away from biological connection.
Think of a 'step' as a degree of relationship, and 'mother' as a female parent. A stepmother is a woman who becomes a mother through marriage, not by birth.