arduous /ärˈdū-əs/

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

ardˈuously adverb

• Gog and Magog
• go-getter
• go-getters
• go-getting
• goggle
• goggle-box
• goggle-boxes
• hypernatraemia
• hypernatraemias
• hypernova
• hypernovae
• hypernovas
• hypernym
• hypernymies
• hypernyms
• hypernymy
• hyperon
• hyperons
• hyperopia
• hyperopias
• hyperparasite
• hyperparasites
• hyperparathyroidism
• hyperphagia
• hyperphagias