The boxes feature sets of unknown items that can improve a player's performance in the game significantly, but can also be of little value and help. (casinonewsdaily.com)
She seemed to find objects in the garden we never would have known existed and make a mess all over the lawn with bits of plant and other unknown items. (second-opinion-doc.com)
Young children are naturally curious about the world around them, and they tend to touch unknown items or stick small objects in their mouths. (childinjuryfirm.com)