arduous /ärˈdū-əs/

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

ardˈuously adverb

ardˈuousness noun

• knickered
• knickerless
• knickers
• knick-knack
• knick-knackatory
• knick-knackeries
• knick-knackery
• knick-knacket
• knick-knacks
• medullate
• medullated
• Medusa
• medusae
• Medusae
• medusan
• medusans
• medusas
• Medusas
• medusiform
• medusoid
• medusoids
• meed
• meeds
• meek
• meeken