the word "unarguably" is built upon the core verb "argue", which entered english from old french "arguer", itself from latin "arguere" meaning "to make clear, to assert, to prove". the latin root is thought to derive from a proto-indo-european base meaning "to shine, be white", linking the concept of arguing to making a point clear or bright. the prefix "un-" negates the possibility, and the suffix "-ably" transforms it into an adverb describing the manner. thus, the literal morphemic sequence "not + able to be argued + in a manner" evolved into the modern abstract meaning of something being beyond dispute or incontrovertible.

Structure: un (not) + argu (to argue) + ably (in a manner of) - un: a prefix of old english origin, meaning "not". - argu: a root derived from the latin verb 'arguere', meaning "to make clear, to prove, to accuse". in english, it forms the core of words related to presenting reasons. - ably: an adverbial suffix of latin/french origin (via middle english -able + -ly), meaning "in a manner that is (adjective)".