Simple past tense and past participle of oppress.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "opprest" in a sentence
"His powerful aid, and calls the opprest his friends."
"You know that Weston was formerly in the same state with Cowper, and you likewise know that he is subject to that calamity when opprest with care and business."
"And the guilt-burthened Soul is no longer opprest."