noun
stepchild
STEP-chyld/ˈsteptʃaɪld/
A spouse's child from a different relationship.
The new husband kneels to greet his stepchild beside the child's mother.

Etymology
Step- is presumed originally to have suggested loss, and its combination with child once meant an orphan. As the orphanage association faded, stepchild came to mean a spouse's child from another relationship.
In context
as a stepchild, what do you think you need during this process?
More examples
- My stepchildren are my wife's children from her first marriage.
- He has a close relationship with his adult stepchild.
- Both of her stepchildren spend weekends with their other parent.
Forms
stepchild · stepchildren
Similar words
- stepson
- Specifically a spouse's son from a different relationship.
- stepdaughter
- Specifically a spouse's daughter from a different relationship.