Word: stepsis
Part of speech: Noun
Syllables: step
sis
Definition: A stepsister; a sister who has only one parent in common with you
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: sis
Language: en
PoS: Noun
Meaning: clipping of sister; a female person who has the same parents as another person