stepparent
noun
- parent's spouse who is not one's biological parent
Wiktionary
noun
Etymology: Etymology tree Proto-Indo-European *(s)tew- Proto-Germanic *steupa- Proto-West Germanic *steupa- Old English stēop- Middle English step- English step- English parent English stepparent From step- + parent.
- One's parent's spouse who is not one's biological parent.
“The age at which a stepparent entered a child’s life, and whether they lived together and for how long, influences the quality of the relationship, studies show. […] As parents age, “there’s a lot of negotiation and uncertainties,” Dr. Silverstein said. “Who has the right to make decisions for stepparents becomes murky.””