Word: stepgrandmother
Part of speech: Noun
Syllables: step
grand
mo
ther
Definition: The mother of one's stepmother or stepfather.
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: mother
Language: en
PoS: Noun
Meaning: A title of respect for one's mother-in-law.