English 'frigid' from Latin 'frīgidus' (cold), from 'frīgus' (frost), from PIE *sreyg- (cold) — the root of 'refrigerator' and 'fridge.'
Very cold in temperature; lacking warmth of feeling; sexually unresponsive.
From Latin 'frīgidus' (cold, cool, chilly), from 'frīgēre' (to be cold), from 'frīgus' (cold, coldness, frost), from PIE *sreyg- (cold, frost). The same Latin root gives English 'refrigerator' (a device that makes cold again) and 'frigid zone' (the cold polar regions). The figurative sense of 'emotionally cold' developed in the 17th century.
The word 'fridge' (short for 'refrigerator') is spelled with a 'd' even though 'refrigerator' has no 'd' — this is because English speakers added the 'd' by analogy with words like 'bridge,' 'ridge,' and 'ledge,' where '-dge' represents the /dʒ/ sound. The brand name 'Frigidaire' (from 'frigid' + 'air') became so dominant in the early 20th century that in some regions 'frigidaire' became a generic word for refrigerator.