the mathematical expression (unevaluated); convert unevaluated mathematical expression to sumti.

- mekso
- x
_{1}[quantifier/expression] is a mathematical expression interpreted under rules/convention x_{2}.

- parbi
- x
_{1}(me'o, fraction) is a ratio/rate of x_{2}(quantity) with respect to x_{3}(quantity), [x_{2}:x_{3}]. - saclu
- x
_{1}(me'o) is the [decimal/binary] equivalent of fractional x_{2}(me'o) in base x_{3}(quantity). - fatysaclu
- x
_{1}(me'o) is the p-adic representation of number x_{2}in base x_{3}. - ivla
- x
_{1}(brivla/selbri) is used by place x_{2}(number/me'o+FA+bu) being filled with (a description of / symbol for) x_{3}, in the usage of x_{4}, according to rule(s) x_{5}.

- lerfu
- x
_{1}(la'e zo BY/word-bu) is a letter/digit/symbol in alphabet/character-set x_{2}representing x_{3}. - gimrafrimna
- x
_{1}is a rhythmic conjugation of word x_{2}, rhyming with word x_{3}in language x_{4}, with changed final vowel/ending x_{5}. - gimrafrimni
- x
_{1}is a rhythmic conjugation of word x_{2}, rhyming with word x_{3}in language x_{4}, with changed final vowel/ending x_{5}. - kutlerpoi
- x
_{1}is the empty character string - togyku'e
- x
_{1}is a musical interval of size x_{2}in tuning system x_{3}. - vlalerpoi
- x
_{1}is the spelling of the word x_{2}in script/orthography x_{3}// x_{1}is a character string representing word x_{2}. - li'ai
*(exp!)* - unevaluated mekso as name.
- li'ei
- arbitrary character string or irregular number
- na'au
*(exp!)* - converts an unevaluated mekso expression into a sumti referencing its evaluated result (if sensible/defined)
- uoi
*(exp!)* - discursive: marks question construct as allowing filling it with answers that are non-referential constructs only
- sfaile
- x
_{1}is a file consisting of information x_{2}with attributes/type/size x_{3}. - lu bu
- pro-sumti: refers to the last complete {lu}-quotation