Origin: Latin suffix -ous
Unpretentious has 4 different meanings across 1 category:
lacking pretension or affectation
"an unpretentious country church"
"her quiet unpretentious demeanor"
not ostentatious
"his unostentatious office"
"unostentatious elegance"
exhibiting restrained good taste
"the room is pleasant and understated"
Simple, humble, not pretentious, plain.