Definition of laborious

< labor-intensive

laborite >

la·bo·ri·ous    (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)