It is our duty to help those in need.

She is a dutiful daughter who always takes care of her parents.

I had to pay a customs duty on the imported goods.

The government increased the death duty on inherited properties.

I didn't buy anything at the duty-free shops.

The police officer is on point duty.

This heavy-duty machine is built to last.

The company decided to relieve him of his duties due to his poor performance.