What is the Greek word that means plain and simple?

The Greek word for "plain and simple" depends on the specific nuance you want to convey. Here are a few options:

* ἁπλοῦς (haploos): This word literally means "simple" and can also be used to convey "plain" or "uncomplicated."

* εὐθύς (euthys): This word means "straight" or "direct," and can be used to convey "plain" or "unambiguous."

* ἀπλός (aplos): Similar to "haploos," this word also means "simple" and can be used to convey "plain" or "unpretentious."

* μικρός (mikros): This word means "small" or "little," and can be used to convey "plain" or "unimportant."

The best choice will depend on the context and the specific meaning you want to communicate.