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
STEP-
Meaning of STEP- in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012