What does the word "Onerous" mean?

• The required answer is - Burdensome and difficult.

• Onerous (adjective)
English Meaning: Needing great effort; causing trouble or worry.
Bangla Meaning: কষ্টসাধ্য; গুরুভার: an onerous duty/task/responsibility

Example Sentence:
1. The new rules will place onerous responsibilities on employers.
2. The government imposed onerous taxes on imports.

Source:
1. Cambridge Dictionary.
2. Accessible Dictionary by Bangla Academy.