[ suhm-eyt ]
/ ˈsʌm eɪt /
verb (used with object), sum·mat·ed, sum·mat·ing.
to add together; total; sum up.
Origin of summate
First recorded in 1895–1900; back formation from summation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for summated
1900, Modern Latin summatus, past participle of summare "to sum" (see summation). Related: Summated; summating.
Online Etymology Dictionary, © 2010 Douglas Harper