ku'e PEhO… KUhE cmavo

elidable terminator: end mathematical (mex) forethought (Polish) expression; often elidable.

On affix form:

kuspe
x1 ranges/extends/spans/persists/reaches across/over interval/gap/area/scope/extent/range x2.

In notes:

du'a'e (exp!)
mekso n-ary ordered operator: structure creator/ordered tuple, 'endow'; the structure formed by underlying set X1 (as) endowed with element, order, quoted operator, etc. X2, X3, ...
fa'ai (exp!)
mathematical ordered n-ary operator: (pointwise) functional left composition; X1 \circ X.
sau'i (exp!)
mekso n-ary operator: reciprocal of the sum of the reciprocal of each of X1, X2, ..., Xn (for any natural number n); 1/((1/X1) + (1/X.