unknown
Meaning
not known or familiar
a person or thing that is not known or identified
Structure
Usage
The cause of the problem is still unknown.
She ventured into the unknown regions of the map.
The actor was virtually unknown before landing the starring role.
Etymology
The word "unknown" is a straightforward compound formed within English from native Germanic elements. The negative prefix "un-," with its ancient Proto-Indo-European root n̥- meaning "not," is attached to the past participle "known." The verb "know" itself traces back to the Proto-Indo-European root ǵneh₃- (to know). The literal construction "not known" has remained semantically transparent from its Old English beginnings to its modern usage, describing anything from an unidentified factor to an unexplored territory.
Analysis
- un: A prefix of Germanic origin (Old English un-) meaning "not," serving a negating function. - known: The past participle form of the verb "know," from Old English cnāwan (to know, recognize), of Germanic origin.