Antonyms of verb untune

1 of 2 senses of untune

Sense 2
untune -- (cause to be out of tune; "Don't untune that string!")
       Antonym of tune (Sense 2)
      => tune, tune up -- (adjust the pitches of (musical instruments); "My piano needs to be tuned")

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

2 senses of untune

Sense 1
upset, discompose, untune, disconcert, discomfit -- (cause to lose one's composure)
       => arouse, elicit, enkindle, kindle, evoke, fire, raise, provoke -- (call forth (emotions, feelings, and responses); "arouse pity"; "raise a smile"; "evoke sympathy")

Sense 2
untune -- (cause to be out of tune; "Don't untune that string!")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")