unaccented
/AmE ˌənˈækˌsɛn(t)əd 
, BrE ʌnəkˈsɛntɪd, ʌnˈaksəntɪd /
adjective
1 ‹letter› sin tilde, sin acento
2 ‹note› no acentuado; ‹syllable› átono, inacentuado
3 ‹speech/voice› sin acento regional
unaccented
English → Spanish
Oxford English–Spanish