Antonyms of adj sumptuous

1 sense of sumptuous

Sense 1
deluxe, gilded, grand, luxurious, opulent, princely, sumptuous -- (rich and superior in quality; "a princely sum"; "gilded dining rooms")

INDIRECT (VIA rich) -> poor -- (characterized by or indicating poverty; "the country had a poor economy"; "they lived in the poor section of town")

Similarity of adj sumptuous

1 sense of sumptuous

Sense 1
deluxe, gilded, grand, luxurious, opulent, princely, sumptuous -- (rich and superior in quality; "a princely sum"; "gilded dining rooms")
       => rich (vs. poor) -- (suggestive of or characterized by great expense; "a rich display")