the adverb 'warmly' is a transparent formation from its core adjective 'warm'. the root 'warm' traces back to proto-germanic 'warmaz', itself derived from the proto-indo-european root 'gʷʰer-', meaning 'warm, hot'. this ancient root also gave rise to greek 'thermos' (hot) and latin 'formus' (warm), showcasing a deep linguistic connection. the suffix '-ly', originating from old english '-līce', is a prolific adverb-forming element that attached to adjectives to denote manner. thus, 'warmly' literally means 'in a warm manner', a logical evolution where the physical sensation of heat was metaphorically extended to describe emotional fervor and affectionate behavior.

Structure: warm (adjective) + ly (adverb-forming suffix) - warm: from old english 'wearm', of germanic origin; related to dutch and german 'warm', from an indo-european root shared by latin 'formus' 'warm' and greek 'thermos' 'hot'. functions as the adjectival root. - ly: from old english '-līce' (originally an adjectival suffix with the sense 'having the form or character of'), used to form adverbs from adjectives. of germanic origin; related to dutch '-lijk' and german '-lich'.