Main Entry: ar·du·ous

Pronunciation: \ˈär-jə-wəs, -dyu̇-, -jü-əs\

Function: adjective

Etymology: Latin arduus high, steep, difficult; akin to Old Irish ard high

Date: 1538

1 a : hard to accomplish or achieve : difficult <years of arduous training> b : marked by great labor or effort : strenuous <a life of arduous toil — A. C. Cole>
2 : hard to climb : steep <an arduous path>

synonyms see hard

— ar·du·ous·ly adverb

— ar·du·ous·ness noun