If you say that something is ~, you mean that it is definitely true.
Her charm is ~.
...the ~ fact that she was driving with almost twice the legal limit of alcohol in her blood.
ADJ
undeniably
Bringing up a baby is undeniably hard work.
ADV
If you say that something is ~, you mean that it is definitely true.
Her charm is ~.
...the ~ fact that she was driving with almost twice the legal limit of alcohol in her blood.
ADJ
undeniably
Bringing up a baby is undeniably hard work.
ADV
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012