sumji -suj- gismu

x1 is a mathematical sum/result/total of x2 plus/increased by x3.

See also jmina, jalge, mulno, pilji.

In notes:

jalge
x1 (action/event/state) is a result/outcome/conclusion of antecedent x2 (event/state/process).
jmina
x1 adds/combines x2 to/with x3, with result x4; x1 augments x2 by amount x3.
mulno
x1 (event) is complete/done/finished; x1 (object) has become whole in property x2 by standard x3.
pilji
x1 is the product/total/result of factors/multiplicands (x2 and x3) x2 multiplied by x3.