A bundle of wood tied together, a fagot
It was going to be a cold night, so Harry brought another knitch over to the campfire.
I could not find when we first started using the word knitch, but it does actually come from the Middle English word knytche, knucche. So where did it come from before Middle English? Latin as usual? Nope, it all goes back to the Old English word gecnycc, meaning bond.