Something that is ~ is so small that it is not noticed or cannot be seen.
Brian’s hesitation was almost ~.
ADJ
imperceptibly
The disease develops gradually and imperceptibly.
ADV: usu ADV with v, also ADV adj
Something that is ~ is so small that it is not noticed or cannot be seen.
Brian’s hesitation was almost ~.
ADJ
imperceptibly
The disease develops gradually and imperceptibly.
ADV: usu ADV with v, also ADV adj
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012