If you describe something as ~, you mean that it is extremely useful.
I was able to gain ~ experience over that year...
The research should prove ~ in the study of linguistics...
ADJ: oft ADJ in n/-ing, ADJ to n
If you describe something as ~, you mean that it is extremely useful.
I was able to gain ~ experience over that year...
The research should prove ~ in the study of linguistics...
ADJ: oft ADJ in n/-ing, ADJ to n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012