ala
ala refers to nothing.
ona li lukin e ala.
As a modifier, it either negates a predicate or specifies that there are none of something.
mi moku ala a.
When used as a modifier on a noun, it normally indicates that there aren’t any of that noun involved.
jan ala li lon tomo ni.
Some speakers claim to use phrases like jan ala to refer to “non-human things” rather than “no people.”