The word "stepson" originates from Old English stēopsunu, a compound of stēop- and sunu. The prefix stēop- carried the poignant sense of "bereaved" or "orphaned," reflecting the historical reality that such relationships often arose from the death of a parent and the subsequent remarriage of the surviving one. Over time, the term's application broadened to include any child from a spouse's prior union, regardless of whether it was caused by death or divorce. Thus, the modern term logically denotes a "son" connected through the "step" of a parent's new marriage, preserving the ancient link between the concept of loss and the formation of a new, non-biological family bond.

Structure: step (related by remarriage) + son (male child) step: From Old English stēop-, meaning "bereaved, orphaned," used to denote a relationship created by the remarriage of a parent. Its functional role is that of a prefix indicating a familial connection through marriage, not by blood. son: From Old English sunu, meaning "male child." Its functional role is the core noun, specifying the person in the relationship.