Synonyms of off-key in English:

off-key


See definition of off-key

adjective

1‘a slightly off-key rendition of an old family favourite’

SYNONYMS
out of tune, flat, tuneless, unmusical, unmelodic, discordant, dissonant, unharmonious
ANTONYMS

in tune

2‘some of the cinematic effects are distractingly off-key’

SYNONYMS
incongruous, inappropriate, unsuitable, discordant, out of place, out of keeping, jarring, dissonant, inharmonious
ANTONYMS

harmonious