/niːs/, /nis/
OriginFrom Middle English nece (“niece, granddaughter”), from Old French nece (“niece, granddaughter”) (Modern French nièce (“niece”)) from Late Latin neptia, representing Latin neptis (“granddaughter”), from Proto-Indo-European *néptih₂ (“granddaughter, niece”). Doublet of nift.
- A daughter of one’s sibling, brother-in-law, or sister-in-law; either the daughter of one's brother ("fraternal niece"), or of one's sister ("sororal niece").
“My niece just celebrated her 15th birthday.”
- A daughter of one’s cousin or cousin-in-law
Formsnieces(plural) · Nieces(plural)
Source: Wiktionary