im·per·cep·ti·ble 
/ˌɪmpɚˈsɛptəbəl/ adjective
/ˌɪmpɚˈsɛptəbəl/ adjective [more imperceptible; most imperceptible] : impossible to see or notice
▪ imperceptible changes/differences ▪ an almost imperceptible smile/breeze ▪ These changes will be imperceptible to most people.
▪ imperceptible changes/differences ▪ an almost imperceptible smile/breeze ▪ These changes will be imperceptible to most people.
— im·per·cep·ti·bly /ˌɪmpɚˈsɛptəbli/ adverb
/ˌɪmpɚˈsɛptəbli/ adverb
