Word: stepgrandchild
Part of speech: Noun
Syllables: step
grand
child
Definition: The stepchild of one's own child.
Morphemes:
Affix: step-
Language: en
PoS: Prefix
Meaning: A prefix used before father, mother, brother, sister, son, daughter, child, and so forth, to indicate that the person being identified is not a blood relative but is related through the marriage of a parent.
Affix: grand-
Language: en
PoS: Prefix
Meaning: of a generation removed from the original noun
Affix: child
Language: en
PoS: Noun
Meaning: One's direct descendant by birth, regardless of age; a son or daughter.