unchecked

Short definition from Wiktionary

Adjective

1. 1
   Unrestrained, not held back.
2. 2
   Not examined for accuracy, efficiency, etc.
3. 3
   Of a check box: not checked (ticked or enabled).
4. 4
   Of a square: part of only one entry (that is, across or down, but not both).

Verb

1. 1
   simple past and past participle of uncheck.