| toil(work, worry, fret, labor, sweat) |
| moil |
| bear down(verb, expression, study, give, work) |
| hustle(verb, study, give, direct, use) |
| commit(verb, study, give, direct, use) |
| pour it on(verb, expression, idiom, study, give) |
| scratch(verb, study, give, direct, use) |
| shoulder |
| be on tenterhooks(worry, fret, labor, toil, panic) |
| sweat(verb, study, give, work, direct) |
| slave |
| stick it out(expression, idiom, worry, fret, panic) |
| be industrious(verb, study, give, direct, use) |
| bend over |
| buckle down(verb, expression, study, give, direct) |
| concentrate(verb, study, give, direct, use) |
| dedicate(verb, study, give, direct, use) |
| devote(verb, study, give, direct, use) |
| dig(verb, study, give, direct, use) |
| direct(verb, study, give, use, operate) |