hard at it


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Related to hard at it: hard water, Hard boiled eggs
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hard at it

Working diligently. I've been trying to get him to do his book report all day, so if he's hard at it, please don't interrupt him.
See also: hard

hard at it

busily working. informal
1997 Independent I leave home…just after 6 a.m. each day and I'm hard at it by 7.30.
See also: hard