nadir n : the lowest point; time of greatest depression
nascent a :beginning to exist/grow; arising
nexus n :tie, connection, connector, linked series
nib n :bill or beak of bird; point of anything, esp. a pen
nihilistic a :skepticism/denial/disbelief in morals/law
nirvana n :emancipation of the soul; cessation of suffering/pain
noir n :crime fiction/movie, bleak/shadowy setting
nom du jour : statement of meaning of a word; to make clear/distinct
nomenclature n : a vocabulary associated w/specific fields/trades
non de plume :pen name
nonplussed n :state of utter perplexity; puzzle completely
nuance n :subtle/delicate; tone/feeling