summate

verbs

determine the sum of

"Add all the people in this town to those of the neighboring town"

add, add together, add up, sum, sum up, summate, tally, tot, tot up, total, tote up

is derived from

is derived from

is derived from

form or constitute a cumulative effect

summate

is derived from

is derived from

is a type of (narrower)

join for a common purpose or in a common action

"These forces combined with others"