The Greek root word for plain or simple is "haplous."
spartan
ομαλός
The word "plain" in French translates to "simple" or "ordinary" in English.
plain,
A seven letter word for plain and simple could be austere. Other synonyms for plain include basic, unadorned, unambiguous, and commonplace.
plain
spartan
It means simple and plain.
Antonyms for the word ornate: plain, simple
The root word for simplicity is "simple," which comes from the Latin word "simplicis" meaning "plain" or "uncomplicated."
Plain, simple, concise, uncomplicated.