Noah Webster
Unheard
UNHE'ARD, adjective
1. Not heard; not perceived by the ear.
2. Not admitted to audience.
What pangs I feel, unpitied and unheard!
3. Not known in fame; not celebrated.
Nor was his name unheard
4. unheard of; obscure; not known by fame.
Unheard of, new; unprecedented.