frigid (adj.)

1620s, "intensely cold," from Latin frigidus "cold, chill, cool," figuratively "indifferent," also "flat, dull, trivial," from stem of frigere "be cold;" related to noun frigus "cold, coldness, frost," from Proto-Italic *srigos-, from PIE root *srig- "cold" (source also of Greek rhigos "cold, frost"). The meaning "wanting in sexual heat" is attested from 1650s, originally of males. Related: Frigidly; frigidness.

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