x_{1} is a part of Lojban text representing rule 'sumti-4' according to the first edition of the book 'The Complete Lojban Language'.

Inner structure of the rule: sumti-5 | gek sumti gik sumti-4. For the description of the syntax see jarnezi.

- zekri
- x
_{1}(event/state) is a punishable crime/[taboo/sin] to people/culture/judges/jury x_{2}.

- cmapagjvo
- x
_{1}(text) is a lujvo with meaning x_{2}and arguments x_{3}, and which is constructed from tanru/veljvo x_{4}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
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - luvrzei
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - zeiljvo
- x
_{1}(text) is a Lojban compound predicate using the particle “zei”; with meaning x_{2}, arguments x_{3}, built from metaphor (tanru) x_{4}. - zo si si zei fa'o
- x
_{1}is a nonsense zei-lujvo using parts x_{2}, silly by standard x_{3}.

- rilsle
- x
_{1}is the unit of a form of rhythm of x_{2} - sorkubli
- x
_{1}is a mucube - temjudri
- x
_{1}is a point on time axis, of event/state x_{2}, in system x_{3}. - vonmoija'a
- j
_{1}has the rank of Lieutenant Colonel/Commander/Wing Commander (equivalent of NATO OF-4) in military unit /organization j_{2}. - vonseltu'e
- t
_{2}is four-legged with legs t_{1}. - zelvlavonli'i
- x
_{1}is qiyan jueju with tone pattern x_{2}, rhyming at locus x_{3}. - ca'oi
- binary operator: complex number from argument and phase, (r, \phi) \mapsto r e
^{i \phi} - kau'u
- Predicate to variable-binding binary quantifier. The first slot of the predicate must be a property.
- si'ei
- numeric suffix: indicates that the number refers to portionality instead of cardinality
- te'i
*(exp!)* - at a point on time axis
- ti'u'i
*(exp!)* - at the second N of the minute.
- jednvo
- x
_{1}(event/state) is on Thursday or the fourth day of a week x_{2}in system x_{3}. - ki'inmoi
- x
_{1}is in relation x_{4}with x_{2}to the x_{3}th degree; x_{1}is x_{3}nodes before x_{2}in the sequence such that every element thereof and the next element are linked by the relation x_{4}; x_{1}is [ that which is in relation x_{4}with ] (repeat x_{3}times the part between brackets) x_{2} - masnvo
- x
_{1}(event/state) is in the fourth month/April of a year x_{2}in system x_{3}.