assiduity

noun
as·​si·​du·​i·​ty | \ˌa-sə-ˈdü-ə-tē, -ˈdyü-\
plural assiduities

Definition of assiduity 

1 : the quality or state of being assiduous : diligence

2 : persistent personal attention usually used in plural

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Examples of assiduity in a Sentence

this project has been successful only through the assiduity of a lot of people

First Known Use of assiduity

1596, in the meaning defined at sense 1

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Time Traveler for assiduity

The first known use of assiduity was in 1596

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Rhyming Dictionary: Words that rhyme with assiduity

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