ka'ozeino zei namcu zei-lujvo

x1 is a pure real number (such that its imaginary part is 0) understood as an example of a complex number.

Includes 0 = (0,0) = 0 + 0i. This word relies on xo'ei implicitly filling the second slot of "ka'o" and also relies on the Cartesian decomposition of all complex numbers into real and imaginary bases (due to ka'o). It is important to note that this is isomorphic to a 'normal' real number but is not one; it is a complex number with imaginary part 0. See also: ka'o zei namcu and nozeika'o zei namcu.

On affix form:

namcu
x1 (li) is a number/quantifier/digit/value/figure (noun); refers to the value and not the symbol.
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:

ka'o zei namcu
x1 is a complex number (understood as such).
nozeika'o zei namcu
x1 is a pure imaginary number (such that its real part is 0) understood as an example of a complex number.