"unmusical" in the adjective sense
1. unmusical, nonmusical
lacking interest in or talent for music
"too unmusical to care for concerts"
"it is unfortunate that her children were all nonmusical"
2. unmusical, nonmusical
not musical in nature
"the unmusical cry of the bluejay"
3. unmelodious, unmelodic, unmusical
lacking melody
Source: WordNet® (An amazing lexical database of English)
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