Answer: slaved

AnswerCrossword Clue
SLAVED

Worked very hard and doggedly

SLAVED

Worked hard

SLAVED

Worked like a dog

SLAVED
Worked like the devil
SLAVED
Toiled away
SLAVEDWorked too hard
SLAVEDWorked way too hard
SLAVEDWorked one's fingers to the bone
SLAVEDWorked hard.
SLAVEDDrudged.
SLAVEDDrudged
SLAVEDWorked hard for nothing
SLAVEDWorked for Legree
SLAVEDToiled for Legree
SLAVEDToiled
SLAVEDLabored
SLAVEDBroke one's back