Is distressed a verb

Distressed is an adjective. It can also be a verb.

A verb is a Word that describes an action (run, walk, etc), a state of being (exist, stand, etc) or occurrence (happen, become, etc).

For example, "It distressed her greatly to see so many people suffering."

An adjective is a Word that describes a noun (the car is blue / it was a cold day / etc).

For example, "The products were damaged in shipment, so they were sold as distressed merchandise."