unmarked

Etymology

un- + marked

adj

1. Not bearing identification.
   an unmarked highway patrol vehicle
   The “little green men”—faces covered, wearing unmarked olive uniforms, speaking Russian and using Russian weapons—have played a significant role in both the occupation of Crimea and the civil war in eastern Ukraine.¹⁹⁶ 2015, Shane R. Reeves, David Wallace, “The Combatant Status of the “Little Green Men” and Other Participants in the Ukraine Conflict”, in International Law Studies, US Naval War College, volume 91, number 361, Stockton Center for the Study of International Law, page 393
2. Free from blemishes.
3. Not noticed.
4. (sports) Not marked, not closely followed by a defensive player.
   Bale worked Bozovic again as he was left unmarked in the Montenegro area but could not get enough power on his header from a looping cross. September 2, 2011, “Wales 2-1 Montenegro”, in BBC
5. Not having been marked, or assigned a score.
   The teacher sat down to a pile of unmarked work.
6. (linguistics) Not marked; not standing out as unusual.
   The use of that word in that context was unmarked.