ne'o VUhU3 cmavo

unary mathematical operator: factorial; a!.


On affix form:

cnebo
x1 is a/the neck [body-part] of x2; [metaphor: a relatively narrow point].

In notes:

ne'o'o
mekso quaternary operator – Pochhammer symbol: with/for input (X1, X, this word/function outputs \prodk = 0^X2 - 1 (X; by default, X4 = 1 unless explicitly defined otherwise.
fampi'i
x1 is the factorial of x2.
ma'oi'e (exp!)
Like "ma'oi" but outputs the officially-designated/canonical sub-selma'o (if any) to which the immediately following and quoted word (cmavo) belongs, otherwise outputting the whole relevant selma'o in fashion equivalent to "ma'oi".