FRIGIDEST
Adjective
frigidest
superlative form of frigid: most frigid
Source: Wiktionary
FRIGID
Frig"id, a. Etym: [L. frigidus, fr. frigere to be cold; prob. akin to
Gr. Frill.]
1. Cold; wanting heat or warmth; of low temperature; as, a frigid
climate.
2. Wanting warmth, fervor, ardor, fire, vivacity, etc.; unfeeling;
forbidding in manner; dull and unanimated; stiff and formal; as, a
frigid constitution; a frigid style; a frigid look or manner; frigid
obedience or service.
3. Wanting natural heat or vigor sufficient to excite the generative
power; impotent. Johnson. Frigid zone, that part of the earth which
lies between either polar circle and its pole. It extends 23Arctic.
Source: Webster’s Unabridged Dictionary 1913 Edition