unswept

adjectives

not swept or having sweep
"a boxy little plane with square unswept wings"
antonym
not having been swept
"unswept floors"
is similar to
soiled or likely to soil with dirt or grime
"dirty unswept sidewalks"; "a child in dirty overalls"; "dirty slums"; "piles of dirty dishes"; "put his dirty feet on the clean sheet"; "wore an unclean shirt"; "mining is a dirty job"; "Cinderella did the dirty work while her sisters preened themselves"