(US) Initialism of National Intelligence Estimate. / Initialism of National Interest Exemption.

A surname.

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").

Someone's nephew's wife. / Someone's sibling's daughter-in-law. / Someone's spouse's sibling's daughter-in-law. / Someone's husband's niece. (Usually called a niece.)

(US) Initialism of National Institute of Environmental Health Science.

plural of niece

(historical) A serf or bondsman born into servitude.

(chiefly Scotland, Ireland, Northern England) A fist.

plural of nief

(metallurgy) Any of various black metal alloys, made of sulphur with copper, silver or lead, used to create decorative designs on other metals.