The following cmavo are discussed in this section:

go'i |
GOhA |
repeats the previous bridi |

du |
GOhA |
equality |

nu'a |
NUhA |
math operator to selbri |

moi |
MOI |
changes number to ordinal selbri |

mei |
MOI |
changes number to cardinal selbri |

nu |
NU |
event abstraction |

kei |
KEI |
terminator for NU |

So far we have only discussed brivla and tanru built up from brivla as possible selbri. In fact, there are a few other constructions in Lojban which are grammatically equivalent to brivla: they can be used either directly as selbri, or as components in tanru. Some of these types of simple selbri are discussed at length in Chapter 7 , Chapter 11 , and Chapter 18 ; but for completeness these types are mentioned here with a brief explanation and an example of their use in selbri.

The cmavo of selma'o GOhA (with one exception) serve as pro-bridi, providing a reference to the content of other bridi; none of them has a fixed meaning. The most commonly used member of GOhA is probably
* go'i*
, which amounts to a repetition of the previous bridi, or part of it. If I say:

you may retort:

Example 5.90 is short for:

because the whole bridi of
Example 5.89
has been packaged up into the single word
* go'i*
and inserted into
Example 5.90.

The exceptional member of GOhA is
* du*
, which represents the relation of identity. Its place structure is:

x

_{1}is identical with x_{2}, x_{3}, ...

for as many places as are given. More information on selma'o GOhA is available in Chapter 7.

Lojban mathematical expressions (mekso) can be incorporated into selbri in two different ways. Mathematical operators such as
* su'i*
, meaning
“plus”
, can be transformed into selbri by prefixing them with

x

_{1}is the result of applying (the operator) to arguments x_{2}, x_{3}, etc.

for as many arguments as are required. (The result goes in the x_{1} place because the number of following places may be indefinite.) For example:

A possible tanru example might be:

mi | jimpe | tu'a | loi | nu'a su'i | nabmi |

I | understand | something-about | the-mass-of | is-the-sum-of | problems. |

I understand addition problems. |

More usefully, it is possible to combine a mathematical expression with a cmavo of selma'o MOI to create one of various numerical selbri. Details are available in Section 18.11. Here are a few tanru:

la | .prim. | .palvr. | pamoi | cusku |

That-named | Preem | Palver | is-the-1-th | speaker. |

Preem Palver is the first speaker. |

la | .an,iis. | joi | la | .asun. |

That-named | Anyi | massed-with | that-named | Asun |

bruna | remei |

are-a-brother | type-of-twosome. |

Anyi and Asun are two brothers. |

Finally, an important type of simple selbri which is not a brivla is the abstraction. Grammatically, abstractions are simple: a cmavo of selma'o NU, followed by a bridi, followed by the elidable terminator
* kei*
of selma'o KEI. Semantically, abstractions are an extremely subtle and powerful feature of Lojban whose full ramifications are documented in
Chapter 11. A few examples:

Example 5.96 is quite distinct in meaning from:

which suggests the meaning “a room that amuses someone”.