IPA: /ˈstɛpˌfɑːðər/
KK: /ˈstɛpˌfɑːðər/
A man who is married to someone's mother but is not their biological father.
My stepfather is very supportive and always helps me with my homework.
Stepfather → It is formed from "step" (from Old English *stæpe*, meaning a step or degree) and "father" (from Old English *fæder*, meaning a male parent). The word "stepfather" refers to a man who is a father by marriage rather than by blood, indicating a step or degree of relationship.
Think of a 'step' as a degree of relationship, and 'father' as a male parent. A stepfather is a man who takes on the role of a father through marriage.