PLAIN

not decorated or elaborate; simple or basic in character

having no pretensions; not remarkable or special

easy to perceive or understand; clear

(of a person) not beautiful or attractive

sheer; simple (used for emphasis)

denoting or relating to a type of knitting stitch produced by putting the needle through the front of each stitch from left to right.

used for emphasis

clearly or unequivocally

a large area of flat land with few trees

mourn or lament.