Origins of step sister etc?

Question: Origins of step sister etc!?

I am wondering what the origins of the expression "step sister" etc is!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Main Entry: step-
Function: combining form
Etymology: Middle English, from Old English st?op-; akin to Old High German stiof- step-, Old English astepan to deprive, bereave

: related by virtue of a remarriage (as of a parent) and not by blood <stepparent> <stepsister>Www@QuestionHome@Com