— arduously , adv. — arduousness , n.
/ahr"jooh euhs/ or, esp. Brit., /ahr"dyooh-/ , adj.
1. requiring great exertion; laborious; difficult: an arduous undertaking.
2. requiring or using much energy and vigor; strenuous: making an arduous effort.
3. hard to climb; steep: an arduous path up the hill.
4. hard to endure; full of hardships; severe: an arduous winter.
[ 1530-40; arduus erect, steep, laborious; see -OUS ]
Syn. 1. hard, toilsome, onerous, wearisome, burdensome, exhausting.
Ant. 1. easy.