Synonyms for diligent

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diligent implies persevering and careful attention, usually to a particular task, and often connotes enjoyment in the task a diligent student of music; assiduous suggests painstaking, persevering preoccupation with some task assiduous study; sedulous implies unremitting devotion to a task until the goal is reached a sedulous investigation of the crime; industrious suggests habitual devotion to one's work or activity an industrious salesclerk