uncock

verb3

1. •
   To let down the cock of (a firearm).

   • My heart jumped up amongst my lungs. I never waited for to look further, but uncocked my gun and went sneaking back on my tiptoes as fast as ever I could. — 1884
2. •
   To straighten or flatten (remove a cocked shape).
3. •
   To open or spread from a cock or heap, as hay.