arduous /ärˈdū-əs/

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

ardˈuously adverb

• pedro
• peds
• peduncle
• peduncles
• peduncular
• pedunculate
• pedunculated
• pee
• peece
• peed
• peeing
• peek
• peekabo
• peekaboo
• peekaboos
• peeked
• peeking
• peeks
• peel
• peel-and-eat
• peeled
• peeler
• peelers
• peelgarlic
• peelgarlics