context sentence:Bassanio was sadly distressed that the counsellor should ask him for the only thing he could not part with.
Source:Tales from Shakespeare
This word can be both a noun (great mental or physical suffering) or a verb (to cause great mental or physical suffering)
In the sentence above it is a passive verb.
As with many passive verbs, the past participle (distressed) looks and acts like an adjective.

Memonic dis stress