Definition of assiduous in English:

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Pronunciation: /əˈsijo͞oəs/


Showing great care and perseverance: she was assiduous in pointing out every feature
More example sentences
  • Yet the result of this assiduous attention to presentation was that the image became too self-conscious.
  • I accept that Larry could have been more assiduous in his search.
  • The manager has the right to expect that his workers will be careful and assiduous.
diligent, careful, meticulous, thorough, sedulous, attentive, conscientious, punctilious, painstaking, rigorous, particular;



Pronunciation: /əˈsijo͞oəsnəs/
Example sentences
  • On the contrary, these qualities are considered signs of assiduousness and punctiliousness.
  • But in one of the more heroic efforts in tennis history, he set about - with characteristic assiduousness and determination - trying to acquire a grass-court game in order to win it.
  • Apparently some famous violinist whose name escapes me wrote to his son (a violist): ‘You must practise with great assiduousness, since you do not wish to remain a violist for the whole of your life.’


Mid 16th century: from Latin assiduus, from assidere 'be engaged in doing' (see assess), + -ous.

Words that rhyme with assiduous

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