onerous /onˈə-rəs or ōˈnə-rəs/

1. Burdensome
2. Oppressive

onˈerously adverb

• birdwatcher
• birdwatchers
• birdwatching
• birdwing
• birdwing butterflies
• birdwing butterfly
• birdwings
• bird-witted
• birefringence
• birefringences
• birefringent
• bireme
• biremes
• biretta
• birettas
• biriani
• birianis
• biriyani
• biriyanis
• birk
• birken
• birkie
• birkier
• birkies
• birkiest