Definition of assiduous
: showing great care, attention, and effort : marked by careful unremitting attention or persistent application assiduous planning an assiduous book collector She tended her garden with assiduous attention.
Examples of assiduous in a Sentence
They were assiduous in their search for all the latest facts and figures.
The project required some assiduous planning.
Recent Examples of assiduous from the Web
By the same token, out-of-favor fads can suddenly, and without warning, make it into the limelight, surprising even the most assiduous trend-watchers.
Glynn is an assiduous and daring conceptualist with a penchant for excavating the past.
The Obama Administration was especially assiduous in its pursuit of whistle-blowers, and President Trump has also singled them out for scorn.
Kislyak is known for his assiduous cultivation of high-level officials in Washington and was seated in the front row of then-GOP candidate Trump’s first major foreign policy speech in April of last year.
Still, Mr. Shine is emphatically a member of the network’s old guard, with a reputation as a corporate survivor and an assiduous flatterer.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'assiduous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
The history of assiduous
Assiduous came to English directly from the Latin assiduus, an adjective derived from the verb assidēre "to sit beside." To the ancient Romans, assiduus carried meanings ranging from “settled or rooted in place” to “constantly present” to “persistent, unremitting." This last sense was the one borrowed into English four hundred years ago and still used today, often in complimentary phrases such as "an assiduous student" and “assiduous efforts.” In the 18th century, the word took on a mildly pejorative meaning, "obsequious," when used of someone striving to please. This sense has largely passed out of use.
Did You Know?
Judges presiding over assizes (former periodical sessions of the superior courts in English counties) had to be assiduous in assessing how to best address their cases. Not only were their efforts invaluable, but they also served as a fine demonstration of the etymologies of "assiduous," "assess," and "assize." All three of those words derive from the Latin verb assidēre, which is variously translated as "to sit beside," "to take care of," or "to assist in the office of a judge." "Assidēre," in turn, is a composite of the prefix ad- (in this case, meaning "near" or "adjacent to") and sedēre, meaning "to sit."
Origin and Etymology of assiduous
Latin assiduus, from assidēre to sit beside
First Known Use: circa 1552See Words from the same year
Synonym Discussion of assiduous
ASSIDUOUS Defined for Kids
Definition of assiduous for Students
: showing great care, attention, and effort They were assiduous in gathering evidence.
Seen and Heard
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