solely

the word 'solely' is a direct descendant of the middle english 'solely', which was formed from the adjective 'sole'. the adjective 'sole' entered english from old french 'sol', itself derived from latin 'solus', meaning 'alone'. the latin 'solus' is of uncertain origin but may be related to the proto-indo-european root s(w)e-, denoting the self or separateness. the adverbial suffix '-ly' is a prolific english formative from old english, attaching to adjectives to create adverbs of manner. thus, 'solely' literally means 'in a solitary manner', evolving from the concrete sense of being physically alone to the abstract sense of exclusivity or limitation to one factor.

Structure: sole (alone) + ly (adverb suffix) - sole: from latin 'solus' meaning 'alone, only, single'. functions as the root conveying the core meaning of singularity. - ly: from old english '-līc', an adverbial suffix meaning 'having the qualities of; in a specified manner'. functions as a derivational suffix forming adverbs from adjectives.