Antonyms of verb clear_up

1 of 5 senses of clear up

Sense 4
clear up, clear, light up, brighten -- (become clear; "The sky cleared after the storm")
       Antonym of overcast (Sense 1)
      => overcast, cloud -- (make overcast or cloudy; "Fall weather often overcasts our beaches")

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

5 senses of clear up

Sense 1
clarify, clear up, elucidate -- (make clear and (more) comprehensible; "clarify the mystery surrounding her death")
       => explain, explicate -- (make plain and comprehensible; "He explained the laws of physics to his students")

Sense 2
get through, wrap up, finish off, mop up, polish off, clear up, finish up -- (finish a task completely; "I finally got through this homework assignment")
       => complete, finish -- (come or bring to a finish or an end; "He finished the dishes"; "She completed the requirements for her Master's Degree"; "The fastest runner finished the race in just over 2 hours; others finished in over 4 hours")

Sense 3
clear, clear up -- (free (the throat) by making a rasping sound; "Clear the throat")
       => remove, take, take away, withdraw -- (remove something concrete, as by lifting, pushing, or taking off, or remove something abstract; "remove a threat"; "remove a wrapper"; "Remove the dirty dishes from the table"; "take the gun from your pocket"; "This machine withdraws heat from the environment")

Sense 4
clear up, clear, light up, brighten -- (become clear; "The sky cleared after the storm")

Sense 5
clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, illuminate, elucidate -- (make free from confusion or ambiguity; make clear; "Could you clarify these remarks?"; "Clear up the question of who is at fault")
       => clarify, clear up, elucidate -- (make clear and (more) comprehensible; "clarify the mystery surrounding her death")