assiduous

as·sid·u·ous

adj \ə-ˈsij-wəs, -ˈsi-jə-\

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

Related to ASSIDUOUS

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

Antonyms: idle, inactive, unbusy, unemployed, unoccupied

Related Words: knee-deep, swamped; animated, astir, buzzing, flourishing, happening, humming, lively, thriving, vibrant; absorbed, concentrating, engrossed, focused (also focussed), immersed, intent, preoccupied; alive, functional, functioning, going, living, operating, operational, operative, running; energetic, vigorous; hardworking; indefatigable, tireless, untiring

Near Antonyms: free; asleep, dormant, latent, lifeless, quiescent, sleepy; inert, passive; dead, dull, slow; inoperative, nonoperating

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See Synonym Discussion at busy