Laborous a. : Laborious.

Example:
Who was killed more in American history, black people or native americans?

Taxonomy
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Defination from the web:
Laborous in the Online Dictionary. Meaning of Laborous. Pronunciation of Laborous. Translations of Laborous. Laborous synonyms, Laborous antonyms. ... Laborous. laborsaving. Laborsome. labour. labour camp. labour cost. Labour Day. labour dispute. Laboring oar. laboring ...