If you describe something as ~, you mean that there seems to be no end or limit to it.
His reforming zeal was ~.
= infinite, limitless
ADJ
If you describe something as ~, you mean that there seems to be no end or limit to it.
His reforming zeal was ~.
= infinite, limitless
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012