Definition of assiduous adjective from the Oxford Advanced American Dictionary

     

    assiduous

     adjective
    adjective
    NAmE//əˈsɪdʒuəs//
     
    (formal)
     
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  1. 1working very hard and taking great care that everything is done as well as it can be synonym diligent
  2. 2 one of the most assiduous members of the team their assiduous efforts and attention to detail She was assiduous in her duties.
NAmE//ˌæsəˈduət̮i//
 
, NAmE//‑ˈdʒu‑//
 
noun [uncountable]
assiduouslyadverb
 
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He worked assiduously to earn the money for his son's education.
See the Oxford Advanced Learner's Dictionary entry: assiduous