Definition of gruff adjective from the Oxford Advanced American Dictionary

     

    gruff

     adjective
    adjective
    NAmE//ɡrʌf//
     
     
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  1. 1(of a voice) deep and rough, and often sounding unfriendly
  2. 2 (of a person's behavior) unfriendly and impatient Beneath his gruff exterior, he's really a nice guy.
 
adverb
See the Oxford Advanced Learner's Dictionary entry: gruff