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''assiduous'' ▫ᴱᴺ｜Definition｜1st｜20260904120411-00-⌔

assiduous - Wiktionary, the free dictionary

English

Adjective

assiduous (comparative more assiduous, superlative most assiduous)

  • Hard-working, diligent or regular (in attendance or work); industrious.
    • ✤ Synonyms: meticulous, diligent, sedulous; see also Thesaurus: industrious
    • ✤ He was officious in the right time and place, quiet as a lamb when his patron seemed inclined to study or to muse, active and assiduous to assist or divert him whenever it seemed to be wished.1
    • ✤ He died after three weeks’ illness, during which Mrs. Penniman, as well as his daughter, had been assiduous at his bedside.2
    • ✤ A good deal of assiduous attention had enabled Henry to win this place in her affections.3
    • ✤ The most recent attempt to contact Pioneer 10 was on 6-7 February 2003. But in this case, the Madrid station got conclusively null results after an assiduous search.4
    • ✤ Klein rose to prominence in the 1960s by assiduous application of accounting methods to the music industry.5
    • ✤ “Asteroid City,” the latest from Wes Anderson, is filled with the assiduous visuals, mythic faces and charming curiosities that you expect from this singular filmmaker.6

Etymology

A learned borrowing from Latin assiduus, from assidere (“to sit down to”), from ad- (“to”) + sedere (“to sit”).7 Compare sedulous.

Cognate (via assidere) to assess.

Pronunciation

  • (UK) IPA: /əˈsɪdjuːəs/, /əˈsɪd͡ʒuːəs/
  • (General American) IPA: /əˈsɪd͡ʒu.əs/
  • Audio (US): 🔊

Printed 2026-09-04.

(echo:: @ ⌗)

Footnotes

  1. 1831, Sir Walter Scott, chapter 2, in The Surgeon’s Daughter: ↩

  2. 1880, Henry James, chapter 33, in Washington Square ‎, Harper & Brothers, →OCLC, page 249: ↩

  3. 1917, P. G. Wodehouse, “Bill the Bloodhound”, in The Man With Two Left Feet and Other Stories: ↩

  4. 2003 February 20, James A. Van Allen, “Termination of Pioneer 10’s Mission”, in Pioneer 10 & 11 GTT Charged Particles, The University of Iowa: ↩

  5. 2009 July 6, Will Pavia, “Allen Klein, accountant turned manager of the Beatles, dies at 77”, in The Times, UK: ↩

  6. 2023 June 15, Manohla Dargis, “‘Asteroid City’ Review: Our Town and Country”, in The New York Times ‎, →ISSN: ↩

  7. Douglas Harper (2001–2026), “assiduous”, in Online Etymology Dictionary. ↩

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