IPA: //ʌnˈtjuːn//
KK: /ʌnˈtun/
To make something unable to produce a pleasant sound or to disrupt its harmony.
The musician had to untune the guitar before he could fix the broken string.
Past: untuned
Past Participle: untuned
Untune → It is formed from "un-" (meaning not) and "tune" (from Old French *ton*, meaning a musical sound or melody). The word "untune" means to make something not in tune or to disrupt its musical harmony.
Think of 'not' ('un-') being added to 'tune' — this helps you remember that 'untune' means to disrupt the harmony of a musical sound.