KU (http://www.lojban.org/en/publications/reference_grammar/chapter6.html, http://www.lojban.org/en/publications/reference_grammar/chapter10.html)

Elidable terminator for LE and some uses of LA. Indicates the end of a description
sumti. Also used after a tense or modal to indicate that no sumti follows, and in
the compound NA+KU to indicate natural language-style negation.

le prenu ku le zdani ku klama The person, to-the house, goes. The person goes
to the house.

