Definitions for "Unostentatious"
not ostentatious; "his unostentatious office"; "unostentatious elegance"
exhibiting restrained good taste; "the room is pleasant and understated"
free from ostentation or pretension; "the restrained elegance of the room"
To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;
Keywords:  flashy, simple, display
Simple, without flashy display.