FromMiddle Englishwarmnesse, fromOld Englishwearmnes(“warmness, warmth”), fromProto-West Germanic*warmnassī(“warmness, warmth”), equivalent towarm +‎-ness. Cognate withScotswarmnes(“warmness”),West Frisianwaarmens(“warmness”), dialectalDutchwarmenesse,warmnis(“warmness”),German Low GermanWarmnis(“warmness”).

warmness (countable anduncountable,pluralwarmnesses)

1. the state of beingwarm;warmth