(intransitive) to work; to labor / (intransitive) to work; to function / (intransitive) to run or operate (a business, etc.); to do business / (transitive) to work or carve (a material) / (transitive) to knead (dough) / (transitive) to cultivate / (transitive, rare) to butter up or wheedle

to fret (to cut through with a fretsaw, to create fretwork)

to work hard / to keep one's nose to the grindstone

(idiomatic, intransitive) to work hard

(transitive, idiomatic) to overcome resistance with constant pressure or criticism; to pressure; to work over

(simile) to work like a horse (mule)