THE MOHEL MOILED:

Word of the Day (Dictionary.com, December 22, 2004)

moil \MOYL\, intransitive verb:
1. To work with painful effort; to labor; to toil; to drudge. [...]

Moil comes from Middle English moillen, "to soak, to wet,"
hence "to soil, to soil one's hands, to work very hard," from
Old French moillier, "to soften, especially by making wet,"
ultimately from Latin mollis, "soft."