To straighten or flatten (remove a cocked shape)(verb)
To let down the cock of (a firearm).(verb)
To open or spread from a cock or heap, as hay.(verb)
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Use "uncock" in a sentence
"With great regret, I uncock the rifle and lower it!"
"I was blindfolded, but I could hear what they were saying, and I could actually hear the guns as they would cock them and uncock them to try to threaten me."
"With difficulty he managed to uncock it and poke it back in its holster."