Word: stepbrother
Part of speech: Noun
Syllables: step
broth
er
Definition: The stepson of one's parent who is not one's half-brother.
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: brother
Language: en
PoS: Noun
Meaning: A male having at least one parent in common with another (see half-brother, stepbrother).