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Definition of laborious


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la·bo·ri·ous  audio  (l-bôr-s, -br-) KEY 

ADJECTIVE:
  1. Marked by or requiring long, hard work: spent many laborious hours on the project.
  2. Hard-working; industrious.

ETYMOLOGY:
Middle English, from Old French laborieux, from Latin labrisus, from labor, labor

OTHER FORMS:
la·bori·ous·ly(Adverb), la·bori·ous·ness(Noun)


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