Take a food item-a couple of carrots, for example-and put one in an unmarked bag.
They lull students and others into a false sense of security, leaving homonyms or near homonyms of the intended word unmarked.
We are mailing this rejection in a plain unmarked envelope with no return address.
He was buried in an unmarked grave on the hospital grounds.
We didn't trust the handmade, the unmarked or unbranded.
At one point he handed each attendee an unmarked brown envelope.
Security agents follow your correspondent in an unmarked car.
Say someone shows us an unmarked container of water and asks us each how much water is in there.
Or, if it comes in an unmarked box, tape it shut and put it under the tree.
The belly is unmarked and buffy, paler than the body, and the outer tail feathers are whitish.
British Dictionary definitions for unmarked
unmarked
/ʌnˈmɑːkt/
adjective
1.
not carrying a mark or marks: an unmarked police car
2.
not noticed or observed
Word Origin and History for unmarked
adj.
c.1400, "having been given no mark," from un- (1) "not" + past participle of mark (v.). Cf. Old Norse umarkaðr. Meaning "not noticed or observed" is recorded from 1530s.