Hinging

verb

1. To attach by, or equip with a hinge.
2. (with on or upon) To depend on something.
3. The breaking off of the distal end of a knapped stone flake whose presumed course across the face of the stone core was truncated prematurely, leaving not a feathered distal end but instead the scar of a nearly perpendicular break.

   "The flake hinged at an inclusion in the core."

4. To bend.