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English definition of “hard”

hard

adjective [-er/-est only] (SEVERE)   /hɑrd/
not pleasant or gentle; severe: She’s had a hard life. His boss is giving him a hard time (= is being unpleasant to him). Don’t be too hard on her – she’s just learning the job. Someone who is hard on a piece of clothing tends to damage it quickly: I’m very hard on shoes. If water is hard, it contains minerals (= chemical substances) that prevent soap from producing bubbles and cleaning easily.
(Definition of hard adjective (SEVERE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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