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[as-i-doo-i-tee, -dyoo-] /ˌæs ɪˈdu ɪ ti, -ˈdyu-/
noun, plural assiduities.
constant or close application or effort; diligence; industry.
assiduities, devoted or solicitous attentions.
Origin of assiduity
From the Latin word assiduitās, dating back to 1595-1605. See assiduous, -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for assiduity
Contemporary Examples
Historical Examples
  • His tutors always praised him for his assiduity and the trouble he took.

  • Moreover, it is the one mankind, if it could, would cultivate with the most assiduity.

  • But I am more obliged to you for your kindness and assiduity, than I am to him only for thinking of it.

    Imogen William Godwin
  • Mademoiselle Heinzleman's great test of all goodness was assiduity.

    Luttrell Of Arran Charles James Lever
  • Margarita had contrived to gain my interest by the assiduity of her attentions.

    The Memoires of Casanova, Complete Jacques Casanova de Seingalt
  • Of course the news of my assiduity had spread all over the little town.

    'Twixt Land & Sea Joseph Conrad
  • Such zeal, success, and assiduity I did not believe could be expected.

  • Dye it therefore and thoroughly soak it with the assiduity of these cogitations.

    Meditations Marcus Aurelius
  • Then his muchuchos have to move about, and wait upon him with assiduity.

British Dictionary definitions for assiduity


noun (pl) -ties
constant and close application
(often pl) devoted attention
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for assiduity

early 15c., from Latin assiduatem "continual presence," noun of quality from past participle stem of assiduus (see assiduous).

Online Etymology Dictionary, © 2010 Douglas Harper
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