nildumu fu'ivla

x1 (ni) is a quantity

Place structure under discussion; in the mean time, this may be used to refer to the object-type represented by ni. See nundumu, du'umdu, li'imdu, su'umdu, sumdaiklei

In notes:

x1 (si'o) is an idea/concept/thought about x2 (object/abstract) by thinker x3.
x1 (mass) is the object type of argument object x2, as defined by property x3 (ka)