prae-gĕlĭdus, a, um, adj.,
very cold : in locis praegelidis, Liv. 21, 54: frigora, Col. 4, 8: hiems, Plin. 9, 16, 24, § 57: rivi, Sil. 4, 226.
prae-gelidus adj., very cold: Alpes, L. ...
An Elementary Latin Dictionary