diligent in application or attention; persevering; assiduous.
persistently or carefully maintained: sedulous flattery.

Origin of sedulous

1530–40; < Latin sēdulus, adj. derivative of the phrase sē dolō diligently, literally, without guile; replacing sedulious (see sedulity, -ous)
Related formssed·u·lous·ly, adverbsed·u·lous·ness, nounun·sed·u·lous, adjectiveun·sed·u·lous·ly, adverbun·sed·u·lous·ness, noun

Synonyms for sedulous

1. constant, untiring, tireless. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sedulous

Historical Examples of sedulous

  • But if these gallants were sedulous, she was correspondingly indifferent.

    Under the Rose

    Frederic Stewart Isham

  • But there is nothing young in this sedulous suppression of toil.

    American Sketches

    Charles Whibley

  • She wondered what sort of herbs they were, which the old man was so sedulous to gather.

    The Scarlet Letter

    Nathaniel Hawthorne

  • "Will you kindly leave the room," he said to the sedulous Mary.

    Cripps, the Carrier

    R. D. (Richard Doddridge) Blackmore

  • He was, however, not often aware of this sedulous espionage.

    The Destroying Angel

    Louis Joseph Vance

British Dictionary definitions for sedulous



constant or persistent in use or attention; assiduous; diligent
Derived Formssedulity (sɪˈdjuːlɪtɪ) or sedulousness, nounsedulously, adverb

Word Origin for sedulous

C16: from Latin sēdulus, of uncertain origin
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 sedulous

1530s, from Latin sedulus "attentive, painstaking, diligent, busy, zealous," probably from sedulo (adv.) "sincerely, diligently," from sedolo "without deception or guile," from se- "without, apart" (see secret) + dolo, ablative of dolus "deception, guile," cognate with Greek dolos "ruse, snare." Related: Sedulously; sedulousness.

Online Etymology Dictionary, © 2010 Douglas Harper