/ ˌʌndɪˈtektəbl; NAmE / adjective
impossible to see or find :
The sound is virtually undetectable to the human ear.
OPP detectable
/ ˌʌndɪˈtektəbl; NAmE / adjective
impossible to see or find :
The sound is virtually undetectable to the human ear.
OPP detectable
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005