The heavy box was too much for him to carry.

The heaviness of the burden was overwhelming.

Heavy hydrogen is used in nuclear reactors.

The city is known for its heavy industry.

They engaged in heavy petting before deciding to take things further.

Heavy water is commonly used in nuclear reactors.

This heavy-duty machine is built to last.

The boss is known for his heavy-handed management style.

She felt heavy-hearted after the breakup.

She walked slowly, heavy-laden with bags of groceries.