Antonyms of verb clutter

1 sense of clutter

Sense 1
clutter, clutter up -- (fill a space in a disorderly way)
       Antonym of unclutter (Sense 1)
      => unclutter, clear -- (rid of obstructions; "Clear your desk")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb clutter

1 sense of clutter

Sense 1
clutter, clutter up -- (fill a space in a disorderly way)
       => fill, fill up, make full -- (make full, also in a metaphorical sense; "fill a container"; "fill the child with pride")

Antonyms of adj cluttered

1 sense of cluttered

Sense 1
cluttered, littered -- (filled or scattered with a disorderly accumulation of objects or rubbish; "the storm left the drivewaylittered with sticks nd debris"; "his library was a cluttered room with piles of books on every chair")

INDIRECT (VIA untidy) -> tidy -- (marked by order and cleanliness in appearance or habits; "a tidy person"; "a tidy house"; "a tidy mind")

Similarity of adj cluttered

1 sense of cluttered

Sense 1
cluttered, littered -- (filled or scattered with a disorderly accumulation of objects or rubbish; "the storm left the drivewaylittered with sticks nd debris"; "his library was a cluttered room with piles of books on every chair")
       => untidy (vs. tidy) -- (not neat and tidy; "careless and untidy in her personal habits"; "an untidy living room"; "untidy and casual about money")