Naaqidh (pi. Nawaaqidh): A factor which breaks one's Wudhu
Nabi: A prophet.
Nafaqah: Duty of support to a wife and other dependants.
Nafil: Optional or Extra.
Najis (pl anjaas; najaarah): Impurity.
Nasab: Family lineage.
Nashizah: A woman who disobeys her husband.
Nawaaqidh: Factors which break one's wudhu and ghusl.
Nifas: The flow of blood for a duration of 40 - 60 days after childbirth.
Nisaab: A specific amount on which Zakaah is taxable.
Nisful Ushr: 1/20.
Niyah: Intention. The formula necessary to render an act of devotion acceptable.
Copied from 'THE ISLAMIC SCHOLAR'