"You canker blossom!" 3 Shakespearean Insults


[uh-sij-oo-uh s] /əˈsɪdʒ u əs/
constant; unremitting:
assiduous reading.
constant in application or effort; working diligently at a task; persevering; industrious; attentive:
an assiduous student.
Origin of assiduous
1530-40; < Latin assiduus, equivalent to assid(ēre) to sit near, beside, dwell close to (see assess) + -uus deverbal adj. suffix; see -ous
Related forms
assiduously, adverb
assiduousness, noun
unassiduous, adjective
unassiduously, adverb
unassiduousness, noun
1. continuous, tireless, persistent. 2. studious, diligent, sedulous.
1, 2. inconstant, lazy. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for assiduous
  • His staff has been assiduous at providing constituent services.
  • You often have to be so assiduous that it becomes tiresome.
  • Financial and e-commerce sites typically have these protections, but not all businesses are as assiduous.
  • That is, I asked our assiduous packet-compiling office to put them together.
  • I'm an assiduous reader of this magazine and I appreciate its contents and insights in economic matters.
  • Moreover, she says, her high profile is valuable to the charities for which she is an assiduous voluntary fund-raiser.
  • Off-duty, he was an assiduous socialite.
  • The author is reliable, knowledgeable and assiduous.
  • He has a historian's assiduous dedication to telling the truth in all its uncomfortable complexity.
  • Others worry about his assiduous courtship of the news media.
British Dictionary definitions for assiduous


hard-working; persevering: an assiduous researcher
undertaken with perseverance and care: assiduous editing
Derived Forms
assiduously, adverb
assiduousness, noun
Word Origin
C16: from Latin assiduus sitting down to (something), from assidēre to sit beside, from sedēre to sit
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 assiduous

1530s, from Latin assiduus "attending; continually present, incessant; busy; constant," from assidere "to sit down to," thus "constantly occupied" at one's work; from ad "to" (see ad-) + sedere "to sit" (see sedentary). The word acquired a taint of "servility" in 18c. Related: Assiduously; assiduousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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