17
plain(adjective, vague, basic, unclear, ambiguous)
13
simple(adjective, hard, plain, complex, natural)
7
bare
6
unadorned
5
jejune
4
austere
4
undecorated
4
unornamented(difficult, dirty, indefinite)
4
unpretentious
3
restrained
3
conservative
3
modest
3
muted
3
understated
2
minimalist
2
prudent
2
quiet
2
stark
2
toned-down
2
unembellished(adjective, plain)
11 years ago|1.8k views|share |citing 
APASmart Define. (2015). ornate thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ornate/thesaurus/antonyms
ChicagoSmart Define. 2015. "ornate thesaurus" https://smartdefine.org/ornate/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, ornate thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ornate/thesaurus/antonyms>.
MLASmart Define. "ornate thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/ornate/thesaurus/antonyms>