If you are ~ in something, you have learned about it as the result of training or experience. (WRITTEN)
They were both well ~ in the ways of the Army...
ADJ: v-link ADJ in n, oft adv ADJ
see also school
If you are ~ in something, you have learned about it as the result of training or experience. (WRITTEN)
They were both well ~ in the ways of the Army...
ADJ: v-link ADJ in n, oft adv ADJ
see also school
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012