Nil sine magno vita labore dedit mortalibus. Life gives nothing to mortals without great labor. Evarts.
Nil utile quod non honestum. Nothing useful that is not honest. Smith.
Nobilis ira. Noble in anger. Stewart.
Nocturna versate manu, versate diurna. (Hor.) Ponder night and day. Robbins.
Non est vivere sed valere vita. Not living, but health, is life. Moore.
Non flectere a vero. Not to be moved from the truth. Livius.
Non incautus futuri. Not heedless of the future. Lee.
Non nobis solum. Not for ourselves alone. Drayton. Eliot.
Non oblitus. Not forgotten. McTavish.
Non reverter invitus. Reluctantly I do not return. Jenkins.