assiduous
[ uh-sij-oo-uhs ]
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Part of Speechadjective
Origin + Etymology
from Latin assiduus, from assidere ‘be engaged in doing’ (see assess), + -ous
Synonyms
  • diligent
  • exacting
  • indefatigable
  • laborious
  • scrupulous
  • zealous
Antonyms
  • indifferent
  • lazy
  • lethargic
  • negligent
  • neglectful
Definition
constant in application or effort; working diligently at a task; persevering; industrious; meticulous
Example
When it came to his attendance in class, he was assiduous.
Usage Over Time
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