incontrovertibly
UK[ˌɪnkɒntrəˈvɜːtɪbli]US[ˌɪnkɑːntrəˈvɜːrtɪbli]
adv
in a way that is impossible to deny or disprove
Morpheme Breakdown
in
controvert
ibly
in
not
controvert
to dispute, to turn against
ibly
in a manner that can be
Etymology
the word is built upon the latin verb 'controvertere', itself a compound of 'contra-' (against) and 'vertere' (to turn), literally meaning 'to turn against'. the prefix 'in-' negates this action, creating the adjective 'incontrovertible', meaning 'not able to be turned against or disputed'. the adverbial suffix '-ibly' is then added, forming a word that describes an action done in an undeniable manner. the logical progression is from the physical act of turning to the metaphorical act of arguing, then to a state beyond argument, and finally to the manner of that state's expression.
Analysis
Structure: in + controvert + ibly
in- (latin, prefix meaning 'not'); controvert (latin, verb root meaning 'to dispute, to turn against'); -ibly (latin, adverbial suffix meaning 'in a manner that can be')
Examples
the evidence proved incontrovertibly that he was at the scene.
her logic was so sound that her conclusion followed incontrovertibly.
the data shows incontrovertibly that climate change is accelerating.