plain

/pleɪn/

adjective

Meaning

Flat, level.
Simple.
Obvious.
Open.
Not unusually beautiful; unattractive.
"Throughout high school she worried that she had a rather plain face."
Not a trump.

Synonyms

frank,

sincere,

consarn,

darned,

stinking,

no-frills,

simple,

unadorned,

unseasoned,

normal,

ordinary,

blatant,

ostensible,

monochrome

adverb

Meaning

Simply.
"I plain forgot."
Plainly; distinctly.
"Tell me plain: do you love me or no?"