hard at

(redirected from hard at doing working hard at)

hard at (something)

Working diligently on something. I've been trying to get him to do his book report all day, so I'm glad to see that he's finally hard at work. We've been hard at this research for the last three years.
See also: hard

hard at (something)

 and hard at doing something
working hard at something. Tom's busy. He's hard at work on the lawn.
See also: hard