arduous /ärˈdū-əs/

1. Steep, difficult to climb
2. Difficult to accomplish
3. Laborious

ardˈuously adverb

ardˈuousness noun

• equid
• Equidae
• equidifferent
• equidistance
• equidistances
• equidistant
• equidistantly
• equids
• equifinal
• indeterminism
• indeterminisms
• indeterminist
• indeterministic
• indeterminists
• indew
• indewed
• indewing
• indews
• index
• indexal
• indexation
• indexations
• index auctorum
• index case
• index cases