ni'u zei namcu zei-lujvo

x1 is a negative number (less than zero (0)), understood as a member of an ordered set with additive identity, such as the typical structure on the set of all real numbers.

See also: ma'u zei namcu.

On affix form:

namcu
x1 (li) is a number/quantifier/digit/value/figure (noun); refers to the value and not the symbol.
ninmu
x1 is a woman/women; x1 is a female humanoid person [not necessarily adult].
zekri
x1 (event/state) is a punishable crime/[taboo/sin] to people/culture/judges/jury x2.

In definition:

cmapagjvo
x1 (text) is a lujvo with meaning x2 and arguments x3, and which is constructed from tanru/veljvo x4 such that each element of the veljvo is ultimately only a cmavo (including "{zei}", "{ke}"/"{ke'e}", "{bo}", etc.), gismu, or rafsi of such cmavo or gismu.
zejvo
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
luvrzei
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
zeiljvo
x1 (text) is a Lojban compound predicate using the particle “zei”; with meaning x2, arguments x3, built from metaphor (tanru) x4.
zo si si zei fa'o
x1 is a nonsense zei-lujvo using parts x2, silly by standard x3.

In notes:

mucyveldekpu
d4 is d2 (default 1) dessertspoon(s)/dessertspoonful(s)/cochleare medium (dstspn./cochl. med.) [volume-unit], standard d3=m1 (default 1 dessertspoon=10 mL),d1 tablespoon(s),d5 teaspoon(s), d6 one ml measuring spoon(s).
mucyxeldekpu
d5 is d2 (default 1) teaspoon(s)/teaspoonful(s)/cochleare minus (t., ts., tsp. or tspn./cochl. min.)[volume-unit], standard d3=m1 (default 1 teaspoon=5 mL),d4 dessertspoon(s),d1 tablespoon(s), d6 one ml measuring spoon(s).
zmana'u
z1=n1 is a positive number relative to origin z2.
de'ei (exp!)
on (n)-th day from a given point (by default from today)
fei'u (exp!)
Prefix division by following unit selbri
mu'au'oi (exp!)
Discursive: resuming/continuing example - start new example
no'e'u (exp!)
digit/number: liminal zero; neither positive nor negative
rai'i (exp!)
mekso (2 or 3)-ary operator: maximum/minimum/extreme element; ordered list of extreme elements of the set underlying ordered set/structure X1 in direction X2 of list length X3 (default: 1)
sai'ei (exp!)
turns PA into CAI; intensity attitude modifier expressed by a mekso.
si'i'ai (exp!)
digit/number: a finite/bounded number, finitely many.
te'ai (exp!)
Exponentiation of unit selbri
xo'ei (exp!)
unary mekso operator: produces a string of n consecutive "xo'e"'s, treated as digits (concatenated into a single string of digits)
ionti
x1 is an ion of radical/(atom of element)x2 with x3 charges
trendelenburge
x1 (humanoid body) is in (reverse) Trendelenburg position with the feet higher than the head by x2 (angle measurement, measured relative to the horizontal; units must be specified).
xaudbo
x1 is \sqrtA = \sqrt2×5 [decimal: 1\times10+(1/2)] of x2 in dimension/aspect x3 (default is units).
zenbaje
x1 (experiencer/function) increases/gains/is incremented/augmented in property/quantity x2 such that it achieves/had achieved having that property at 'time' x3 (abstraction, number) according to standard x4
zmaumce
x1 (li) is a bound on set x2 (set) in direction x3 (li) in ordered structure x4; x1 bounds x2 from the x3 side in x4; x2 is bounded from the x3 side by x1.
ma'u zei ionti
x1 is an cation of radical/(atom of element)x2 with x3 charges.
ma'u zei namcu
x1 is a positive number (greater than zero (0)), understood as a member of an ordered set with additive identity, such as the typical structure on the set of all real numbers.