to cut / to carve / to engrave / to chisel / fig. to chisel away at
锲
=
契
+
钅
:
The Queen of Hearts (qi) is about to finish building her golden harpoon (钅) in the elevator's bathroom (e4). The last step is to engrave her name with an engraver (契). Unfortunately her engraver breaks as she is halfway through; she'll have to use her old chisel (锲) instead.
The robot (大) and the Queen of Hearts (qi) reached an agreement in the space station's bathroom (Ø4). Lacking a proper pen they sign their written deed (契) with an engraver (㓞).