assiduous


as·sid·u·ous

adjective \ə-ˈsij-wəs, -ˈsi-jə-\

: showing great care, attention, and effort

Full Definition of ASSIDUOUS

:  marked by careful unremitting attention or persistent application <an assiduous book collector> <tended her garden with assiduous attention>
as·sid·u·ous·ly adverb
as·sid·u·ous·ness noun

Examples of ASSIDUOUS

  1. They were assiduous in their search for all the latest facts and figures.
  2. The project required some assiduous planning.

Origin of ASSIDUOUS

Latin assiduus, from assidēre
First Known Use: 1622

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