A / ad-algĭdus
adjective

ad-algĭdus

fem. ad-algĭda · neut. ad-algĭdum
very cold; chilly;
very cold, chilly; of climate: adalgidum maxime, Fronto, Ep. ad M. Caes. 2, 9, p. 54 Mai; in Naev. ap. Cic. Or. 45, 152, Clussman would read adalgidum for atque algidum (B. and K.).