Where does “crystal clear” come from?

crystal clear (English) comes from English clear, from Middle English clere, from Old French cler, from Latin clārus, from Proto-Indo-European ḱelh₁- — to warm up, to be hot; to warm up, be hot.

crystal clear (English): Completely clear and understood; Visually clear,...

Definitions

  1. Completely clear and understood; Visually clear,...

Ancestry of “crystal clear”, step by step

StepLanguageWordMeaning
1EnglishclearTransparent in colour; Bright, not dark or...
2Middle EnglishclereAlternative spelling of cler
3Old Frenchclerbright, well-lit, not dark; clear
4Latinclārusclear, bright
5Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot
Every word from Proto-Indo-European ḱelh₁- →Every word from Latin clārus →Every word from Old French cler →