ETYMOLOGY
irregular from frigid + -ious
EXAMPLE
“…Like curelesse cures, past and repast repaire:
Frigidious Ianus two-fold frozen face,
Turnes moyst Aquarius into congeal’d yce:
Though by the fires warme side the pot haue place…”
From: All the workes of Iohn Taylor the water-poet
Beeing sixty and three in number
Anagrams and Sonnets, 1630
Lexicophilia 