STEP-


Meaning of STEP- in English

[step-] comb form [ME, fr. OE steop-; akin to OHG stiof- step-, OE astepan to deprive, bereave]: related by virtue of a remarriage (as of a parent) and not by blood "stepparent" "stepsister"

Merriam-Webster English vocab.      Английский словарь Merriam Webster.