dʰeh₁-rm-
“that which is heated, warm”Widely acceptedtemperaturequality
therm, thermal, thermos
Extended form yielding Greek thermos, English therm, thermal, thermos, thermometer.
bʰerw-mn̥-₂“boiling, fermenting mass”bʰerǵ-eyo-“to keep brightening, shining”deru-“tree, wood, to be firm”dʰeh₁-ḱ-ul-“easy to make, manageable”dʰerǵʰ-mn̥-“firmness, hardness, endurance”gʰeHd-“to unite, join, be fitting”gʰer-mn̥-₂“warmth, heat (nominal)”gʰerH-mn̥“a warm thing, heated substance”