Plain

extensive tract of level open land

a basic knitting stitch made by putting the needle through the front of the stitch from the lefthand side

express complaints, discontent, displeasure, or unhappiness

clearly revealed to the mind or the senses or judgment

not elaborate or elaborated

lacking patterns especially in color

not mixed with extraneous elements

free from any effort to soften to disguise

lacking embellishment or ornamentation

lacking in physical beauty or proportion

unmistakably (`plain' is often used informally for `plainly')