Third-person singular simple present indicative form of uncheck.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "unchecks" in a sentence
"ROMANS (voice-over): An ethos often unchecks during the boom of the last 20 years."
"The gentleman descends, unchecks the horses, wipes his brow, takes a drink at the spout and looks around, evidently remarking upon the lovely view, as he swings his handkerchief in an explanatory manner."
"WM_COMMAND messages with the Ribbon element ID are posted when the user clicks or checks/unchecks a Ribbon element."