Downtrodden (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">downtrodden</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for oppressed that I've seen before include "Downtrodden" , "Burdened, physically or mentally" , "Gave too much weight to" , "Persecuted, burdened" , "Kept in subjection" .)
(Other definitions for sad that I've seen before include "Mournful - sorry" , "Unfortunate" , "Unhappy or melancholy" , "Deplorable" , "Gloomy" .)