Seasick (adjective)

1. Feeling unwell or nauseous due to the motion of a ship or boat on the water.
2. Feeling dizzy and disoriented due to the motion of the waves.

Origin:

From the words sea, meaning the large body of salt water, and sick, meaning feeling unwell or nauseous, combined to form seasick, meaning feeling unwell or nauseous due to the motion of a ship or boat on the water.

Examples:

1. The rough seas made many of the passengers seasick.
2. He was seasick from the rolling of the boat.
3. The constant swaying made her seasick and she couldn't keep any food down.
4. I was seasick on the first day of the cruise but I got used to it later on.
5. The sailors were used to the sea but the passengers were seasick.