verb (~d; summating) Etymology: back-formation from summation Date: 1900 transitive verb to add together ; sum up , intransitive verb to form a sum or cumulative effect
SUMMATE
Meaning of SUMMATE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012