If you describe something as ~, you mean that there is or appears to be so much of it that it will never be exhausted.
...a cheap and potentially ~ supply of energy...
The opportunities are ~.
= endless
ADJ
If you describe something as ~, you mean that there is or appears to be so much of it that it will never be exhausted.
...a cheap and potentially ~ supply of energy...
The opportunities are ~.
= endless
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012