Worn and Wear upon

Worn adjective - Depleted in strength, energy, or freshness.

Wear upon is a synonym for worn. In some cases you can use "Wear upon" instead a verb "Worn".

Wear upon verb - Exhaust or get tired through overuse or great strain or stress.

Worn is a synonym for wear upon. Sometimes you can replace term "Worn" with "Wear upon", this verbs are similar.