When an unadvertised business is sold it is only worth as much as its stock of goods and its fixtures.
Its labours were unadvertised, and its praises remained unsung.
Its unadvertised propaganda is carried on, naturally, by its adherents.
early 15c., "to take notice of," from Middle French advertiss-, present participle stem of a(d)vertir "to warn" (12c.), from Latin advertere "turn toward," from ad- "toward" (see ad-) + vertere "to turn" (see versus).
Sense shifted to "to give notice to others, warn" (late 15c.) by influence of advertisement; specific meaning "to call attention to goods for sale, rewards, etc." had emerged by late 18c. Original meaning remains in the verb advert "to give attention to." Related: Advertised; advertising.