assiduous

Etymology

Learned borrowing from Latin assiduus, from assidere (“to sit down to”), from ad- (“to”) + sedere (“to sit”). Cognate (via assidere) to assess.

adj

1. Hard-working, diligent or regular (in attendance or work); 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. 1831, Sir Walter Scott, chapter 2, in The Surgeon's Daughter
   A good deal of assiduous attention had enabled Henry to win this place in her affections. 1917, P. G. Wodehouse, “Bill the Bloodhound”, in The Man With Two Left Feet and Other Stories
   Klein rose to prominence in the 1960s by assiduous application of accounting methods to the music industry. 6 July 2009, Will Pavia, “Allen Klein, accountant turned manager of the Beatles, dies at 77”, in The Times, UK
   “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. 2023-06-15, Manohla Dargis, “‘Asteroid City’ Review: Our Town and Country”, in The New York Times, →ISSN