(~es, or ~s)
A ~ is a small cave with interesting or attractively shaped rocks.
Water trickles through an underground ~.
N-COUNT
(~es, or ~s)
A ~ is a small cave with interesting or attractively shaped rocks.
Water trickles through an underground ~.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012