Niece would be an opposite as a niece is female and a nephew is male.
nephew
niece
In English cousin denotes a family relationship, it is not gender specific.
The noun nephew is a singular, common, abstract noun, a word for the relationship of a person or a concrete noun, a word for the person with such a relationship.
Bhatija (भतीजा) is a Hindi word which means Nephew (Sister's son) in English.
nephew
There is no "opposite" of a nephew, unless you say that since a nephew is male, the opposite is a niece, who is female.
niece
niece
Nephew is the opposite of cousin
NIECE
Niece would be an opposite as a niece is female and a nephew is male.
The opposite relationship of uncle would be Niece or Nephew.(The opposite gender is aunt.)
nephew in yoruba
Yes, nephew is a noun, a common, singular noun.
In Russian, the word for nephew is "племянник" (plemyannik).
My nephew cannot hold a job.I have only one nephew. Though my nephew, we are nothing alike.