unfastener
Thing that loosens
An unfastener is anything that releases, loosens, or opens something that was secured—a tool, device, or person that undoes a fastening.
The word is uncommon; English speakers typically name the specific implement: zipper pull, button hook, wrench.
When used, it often appears in figurative contexts: Time is the great unfastener of certainties.
To let go
- detachTo separate from
- loosenReduce tension or grip
- unbindTo release from bonds
- unhookRelease from a curved fastener
unclip · unlatch · unzip · unbuckle · untie · unclasp · disconnect · undo
Tool for turning fasteners
- wrenchTool for turning fasteners
- pliersHinged metal gripping tool
- hex keySix-sided fastener driver
- socket wrenchTool for turning fasteners
ratchet · pry bar · bolt cutter · vice grips · seam ripper · nail puller · corkscrew · staple remover
release
To let go
unhook · unclip · unlatch · unzip · unbuckle · untie · unclasp · disconnect · undo · open
screwdriver
Tool for turning fasteners
socket wrench · ratchet · pry bar · bolt cutter · vice grips · seam ripper · nail puller · corkscrew · staple remover · wire cutter
zipper
Toothed closure device
snap · buckle · velcro · pin · brooch · clip · strap · lace · belt · chain