The verb 'summed' is built upon the noun 'sum', which entered English from Anglo-Norman summe and Old French some, tracing back to the Latin summa. In Latin, summa was the feminine form of summus, meaning "highest," derived from superus (upper). This reflects the ancient Roman accounting practice of placing the total, or the highest number, at the top of a column of figures. The addition of the regular past tense suffix -ed follows a standard Germanic grammatical pattern, transforming the concept of a total into the action of calculating that total or of providing a final, concise statement. Thus, the literal action of 'summing' evolved from the concrete idea of arriving at the highest or final figure in a list.

Structure: sum (total) + med (verb past tense/participle suffix) - sum: From Latin summa meaning "the highest part, total, whole." In this word, it functions as the lexical root conveying the core meaning of a total amount. - med: A representation of the English inflectional suffix -ed, indicating the past tense or past participle form of a regular verb. Its origin is in Proto-Germanic -daz and Old English -ed, -od, -ad.