summate (verb) add: simple arithmetical process of increase; accumulation
Detalii: ad is short for advertisement while add means 'to join or unite' so as to increase in size, quantity, quality, or scope
Sinonime: calculate,
cast, compute,
count, count up, do addition,
enumerate,
figure,
reckon, reckon up,
sum, summate,
tally, tot, tot up,
total, tote
Antonime: subtract