"unostentatious" in the adjective sense
1. unostentatious, unpretentious, unpretending
not ostentatious
"his unostentatious office"
"unostentatious elegance"
2. understated, unostentatious, unpretentious
exhibiting restrained good taste
"the room is pleasant and understated"
Source: WordNet® (An amazing lexical database of English)
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