See ↑ DIFFICULT 1,3, ↑ HARD 1,2, ↑ TIRED/TIRING 7
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• ↑ be hard at work
• ↑ be hard of hearing
• ↑ be hard on
• ↑ come down hard on
• ↑ difficult/hard
• ↑ drive/push yourself too hard
• ↑ not difficult/hard
• ↑ try hard
• ↑ try/think/push etc too hard
• ↑ work hard
• ↑ work sb hard