Roots/*keh₂w-keh₂w-“to burn, to be hot”Widely acceptedqualitiesfirehotRoot for burning and heat. Gives Latin calidus (warm), English "heat", "hot", Greek kaûma.Related RootsH₂eydʰ-“to burn, to kindle a fire”bel-“strong, powerful”bʰerǵʰ-₂“high, elevated”bʰleg-“to shine, burn, flash”bʰleg-eyo-“to keep burning, blazing”bʰleg-mn̥“burning, inflammation”bʰleg-mn̥-₂“blaze, shining fire”bʰleh₁-g-“to set on fire, to blaze”