(Homonym: gnu, knew, nu).
1. Having no previous example or precedent or parallel; SYN. unexampled.
2. (Often followed by 'to') Unfamiliar; SYN. new to.
3. Not of long duration; having just (or relatively recently) come into being or been made or acquired or discovered.
4. Unaffected by use or exposure.
5. Other than the former one; different.

(Linguistics) In use after Medieval times

Newly, recently — usually used in combination