The word 'winningest' is a modern American English formation, primarily used in sports journalism and statistics. It is constructed by directly appending the native English superlative suffix '-est' to the present participle 'winning,' treating it as a base adjective. This process bypasses the traditional adjectival form 'winning' (which means attractive or successful) to create a synthetic, efficiency-driven term meaning "the most winning." The core verb 'win' itself has a rich history, evolving from the Old English 'winnan,' which originally conveyed struggle and toil, to its modern sense of achieving victory. Thus, 'winningest' encapsulates a journey from ancient struggle to modern competitive triumph, quantified through a straightforward grammatical construction.

Structure: winning (to achieve victory) + est (superlative suffix) - winning: From the verb 'win', of Old English origin (winnan, meaning "to labor, toil, struggle, fight"). In this compound, it functions as a participial adjective meaning "characterized by victory." - est: A superlative suffix of Old English origin (-est, -ost), used to form the highest degree of comparison of adjectives and adverbs.