summate

[ 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

Examples from the Web for summate

  • They accumulate in time, finally they summate, and exercise their influence even at the beginning of the service.