onerous /onˈə-rəs or ōˈnə-rəs/

1. Burdensome
2. Oppressive

onˈerously adverb

• ion engine
• ion engines
• ion-exchange
• ion-exchanges
• Ionian
• ionic
• Ionic
• ionic bond
• ionic bonds
• Ionic dialect
• Ionicise
• Ionicised
• Ionicises
• Ionicising
• Ionicize
• Ionicized
• Ionicizes
• Ionicizing
• Ionic school
• ion implantation
• ion implanter
• ion implanters
• ionisable
• ionisation
• ionise