[as-i-doo-i-tee, -dyoo-]

noun, plural as·si·du·i·ties.

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 Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for assiduity

Contemporary Examples of assiduity

  • They did not remotely achieve equality with men, but they won grudging respect and, for their assiduity, they sometimes won power.

    The Daily Beast logo
    The Heroine of the New Deal

    Christine Stansell

    March 3, 2009

Historical Examples of assiduity

  • 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.


    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

British Dictionary definitions for assiduity


noun plural -ties

constant and close application
(often plural) 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

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