The word 'plain' usually means self-evident, without adornment, or a land form.
To use these in a sentence:
SELF EVIDENT: "It was plain to the police officer that the criminal has been wounded"
WITHOUT ADORNMENT: "She had a very plain and ordinary face with no distinguishing characteristics."
LAND FORM: "That is a very flat plain."
She wore a plain shirt. That is a very plain design. Plain as can be, he walked over here.
It's plain to see that you have never used the word plain in a sentence!
The Abyssal Plain is the lowest part in the ocean you wouldn't want to go down there.
you are just plain ugly.
That's two words, you know.The coastal plain borders the ocean.We studied the coastal plain in school.Our town is on the coastal plain.
plain girls don't get dates unless they.... (incomplete sentence)
On Monday the boss wore a plain tie, but today he wore a striped tie.
There was not one scribble on the plain sheet.
the shirt was primitive for it was plain
Elements can contain plain text, other elements, or both.
Palpable is an adjective describing something that is able to be felt, either concrete or abstract, or plain to see.
The flood destroyed the poor city.