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sedulous

[sej-uh-luh s] /ˈsɛdʒ ə ləs/
adjective
1.
diligent in application or attention; persevering; assiduous.
2.
persistently or carefully maintained:
sedulous flattery.
Origin
1530-1540
1530-40; < Latin sēdulus, adj. derivative of the phrase sē dolō diligently, literally, without guile; replacing sedulious (see sedulity, -ous)
Related forms
sedulously, adverb
sedulousness, noun
unsedulous, adjective
unsedulously, adverb
unsedulousness, noun
Synonyms
1. constant, untiring, tireless.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unsedulous

sedulous

/ˈsɛdjʊləs/
adjective
1.
constant or persistent in use or attention; assiduous; diligent
Derived Forms
sedulity (sɪˈdjuːlɪtɪ), sedulousness, noun
sedulously, adverb
Word Origin
C16: from Latin sēdulus, of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for unsedulous

sedulous

adj.

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
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