the word "vanishingly" is built upon the verb "vanish," which entered english via old french, tracing back to the latin verb evanescere, meaning "to disappear" or "to pass away," itself derived from e- (out) and vanus (empty). the addition of the "-ing" suffix transforms the action into a descriptive adjective, "vanishing," which characterizes something that is in the process of disappearing. finally, the adverbial suffix "-ly" attaches to this adjective, forming an adverb that describes an action performed to the point of near or complete disappearance. thus, "vanishingly" logically evolves from the concrete idea of fading from sight to an abstract modifier indicating an extreme degree of minuteness or improbability.

Structure: vanish (disappear) + ing (adjective suffix) + ly (adverb suffix) vanish: from middle english vanisshen, from old french esvanir (stem vaniss-), from latin evanescere (to disappear, vanish). the functional role is the core verb root. ing: from old english -ende, -unge, a suffix forming present participles and verbal nouns. its functional role is to create an adjective from the verb. ly: from old english -līc, an adverbial suffix. its functional role is to convert the adjective into an adverb.