1.
simple, plain, austere
Lacking unnecessary complexity or ornamentation; unadorned and basic in design or style.
簡素な部屋だ。
It's a simple room.
Related Words
Antonym:
豪華 (luxurious)
Compare:
枯淡 (refined simplicity)
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簡略 (simplification)
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質素 (simple, frugal)
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簡単 (easy, simple)