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hard

adjective (USING EFFORT)
 
 
/hɑːd/ US  /hɑːrd/

Definition

B1 needing or using a lot of physical or mental effort: Go on - give it a good hard push! It was hard work on the farm but satisfying.Complicated and difficult to doDifficult to understand hardness
 
 
/-nəs/ noun [U]
These alloys are characterized by their extreme hardness.Hard and firmWater in general
(Definition of hard adjective (USING EFFORT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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