Crossword Dictionary

ASSIDUOUS

assiduous, sedulous - a 
marked by care and persistent effort; "her assiduous attempts to learn French"; "assiduous research"; "sedulous pursuit of legal and moral principles" 

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Synonyms

active, bustling, busy, diligent, employed, engaged, hopping, industrious, laborious, occupied, sedulous, tied-up, working

merriam-webster

Examples

Burke, on the contrary, was assiduous and orderly, and had none of the vices of profusion.

He was assiduous in his attendance on Queen Hortense until the Hundred Days brought him into active service again.

He was henceforth assiduous in the performance of his duties, preaching in his cure of Novoli, and also in the cathedral and the church of the Angeli at Florence.

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Etymology

"attentive, devoted, constant in application," 1530s, from Latin assiduus "attending; continually present, incessant; busy; constant," from assidere/adsidere "to sit down to, sit by" (thus "be constantly occupied" at one's work); from ad "to" (see ad-) + sedere "to sit," from PIE root *sed- (1) "to sit." The word acquired a taint of "servile" in 18c. Related: Assiduously; assiduousness.

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