vujnu -vuj-vu'u- experimental gismu

x1 is the subtraction-difference of x2 and x3 (and x4 etc.); x1 = x2 - x [ - x4 etc.]

Near-synonymous to selsumji, but better conveys the concept of "subtraction", as opposed to merely "addend", as well as being more convenient for lujvo. See vu'u, sumji, pilji, dilcu, frinu. Proposed rafsi: -vuj-, -vu'u-


In notes:

cu'alvu'u
x1 is the absolute difference of numbers x2 and x3 ; x1 = |x2 - x
detcacryvu'u
x1 (number) is the number of hours (pi'e for minutes) that the timezone of location x2 is ahead (before, if x1 is negative) of location/standard x3
selsumji
x1 is the difference x2 minus x3; x1 is the amount that remains in substracting x3 from x2.