From Longman Dictionary of Contemporary Englishwork somebody hardwork somebody hard (also work somebody into the ground informal)WORK HARD to make someone work very hard The coach has been working us really hard this week. People have complained that they are being worked into the ground.work yourself into the ground I’ve worked myself into the ground setting up this interview. → work
Examples from the Corpus
work somebody hard• The bank's managers admit that they work their employees hard, but on the other hand they pay good wages.• Sometimes I think that they work us too hard in this office. 