Overburdened; depressed.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)

Usage examples:

I have all my life been shy and oppressed and have felt as if I could look nobody in the face, though I had nothing to conceal; but if this time I behave in a cowardly manner, I believe I should be less able to do so than ever- and this time I should have good reason enough for it.
- Dame Care by Hermann Sudermann
I did my work, of course, as if nothing oppressed me, but in my heart I was beginning to face the possibility that, even if I tried, I might fail to reach my goal.
- Over Prairie Trails by Frederick Philip Grove
I remarked that it seemed to me the wiser plan would be to wait and see how Home Rule worked before plunging into revolution; then, if it was found that Ulster was really oppressed it would be time enough for her army to take the field.
- The Charm of Ireland by Burton Egbert Stevenson