UNTUNE
untune
(verb) cause to be out of tune; “Don’t untune that string!”
upset, discompose, untune, disconcert, discomfit
(verb) cause to lose one’s composure
Source: WordNet® 3.1
Etymology
Verb
untune (third-person singular simple present untunes, present participle untuning, simple past and past participle untuned)
(transitive) To cause (something) to be out of tune; to make incapable of harmony, or of harmonious action.
Synonyms
• detune
• distune
Source: Wiktionary
Un*tune", v. t. Etym: [1st pref. un- + tune.]
Definition: To make incapable of harmony, or of harmonious action; to put
out of tune. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition