Meaning of STEP- in English

STEP-

combining form Etymology: Middle English, from Old English stēop-; akin to Old High German stiof- ~, Old English astēpan to deprive, bereave related by virtue of a remarriage (as of a parent) and not by blood

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.