noblesse oblige (Fr.). Rank imposes obligations.
nolens volens (L.). Willing or unwilling.
nolle prosequi (L.). To abandon prosecution.
nom de guerre (Fr.). A war name; a pseudonym; a pen name.
nom de plume (Fr.). A pen name. (Incorrect for nom de guerre.)
non compos mentis (L.). Not of sound mind.
non omnia possumus omnes (L.). We cannot, all of us, do everything.
non sequitur (L.). It does not follow.
nota bene (L.). Mark well.