The initial grinding of the teeth of a cutting tool, prior to sharpening(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "jointing" in a sentence
"The surface ships used by undersea-cable companies to install and repair cables have similar chambers--called jointing rooms--where crews work on the delicate fibers."
"Not pictured was what sucked up most of my day - the chicken-ancho cacciatore made completely from scratch (from jointing and skinning the bird to chopping the veg to stewing it all together)."
"Her mermaids, with their serpentine jointing, displayed an uncanny sinuousness."