Origin of swarfprobably from Old English gesweorf, filings from sweorfan, to file away, scour: see swerve
Origin of swarfOf Scandinavian origin Old Norse svarf
Infrequently used after the 19th century; primarily in technical settings.
(third-person singular simple present swarfs, present participle swarfing, simple past and past participle swarfed)
1565, from Middle English *swerf, from Old English geswearf, gesweorf; akin to Old English sweorfan (modern English swerve), from Proto-Germanic.