x_{1} (mass/si'o) is a class/category/subgroup/subset within x_{2} with defining property x_{3} (ka).

Also taxon, type, kind, classification, species, genus, family, order, phylum. See also cmavo list le'a, cmima, jutsi, ciste, girzu, lanzu, vrici.

- le'a
- klesi modal, 1st place (scalar set) in/of category ...
- sele'a
- klesi modal, 2nd place as a category of/within ...
- tele'a
- klesi modal, 3rd place (category) defined by quality ...

- ciste
- x
_{1}(mass) is a system interrelated by structure x_{2}among components x_{3}(set) displaying x_{4}(ka). - cmima
- x
_{1}is a member/element of set x_{2}; x_{1}belongs to group x_{2}; x_{1}is amid/among/amongst group x_{2}. - girzu
- x
_{1}is group/cluster/team showing common property (ka) x_{2}due to set x_{3}linked by relations x_{4}. - jutsi
- x
_{1}is a species of genus x_{2}, family x_{3}, etc.; [open-ended tree-structure categorization]. - lanzu
- x
_{1}(mass) is a family with members including x_{2}bonded/tied/joined according to standard x_{3}. - vrici
- x
_{1}(set/mass/ind.) is miscellaneous/various/assorted in property x_{2}(ka). - bangyklesi
- x
_{1}is a dialect of language x_{2} - datmau
- z
_{1}=d_{1}is a plurality of/more than all other subgroups of z_{2}as seperated/classified by property z_{3}=d_{3}by amount z_{4}. - jicymivykle
- k
_{1}=jm_{1}=ji_{3}is a phylum [animals]/division [plants] within/of kingdom [biology] k_{2}=ji_{2}. - klulei
- x
_{1}=ku_{1}=kl_{1}is a cultural subset within a larger culture x_{2}=kl_{2}with defining property x_{3}=ku_{2}=kl_{3}. - leiske
- s
_{1}is the taxonomy of s_{2}=k_{2}based on methodology s_{3}. - panrykle
- x1=k1 (mass/si'o) is an equivalence class within/is a substructure of x2 (mathematical structure/object/category/set endowed with operations and properties) with defining characteristic/property/for similarity/under equivalence relation x3=p3, with representative member x4=p1=p2, in geometry/by standard/under paradigm x5=p4
- rorlei
- x
_{1}is a generation [contemporary offspring] of x_{2}. - seljimcymivykle
- k
_{1}=jm_{1}=ji_{3}is a kingdom [biology] of domain [biology] k_{2}. - terpanryziltolju'i
- x1=j2=p3 (ka; jo'u/fa'u term) is the minor difference in/between x2=p2 and x3=p1 that is to be ignored, their similarity being by standard/in geometry x4; x2 is the same as/similar to/parallels x3 in standard/geometry x4 up to/modulo/except for/ignoring unimportant difference x1;
- rakle
- x
_{1}is an atomic element in group x_{2}[usually, vertical column; denotes electron configuration and, thereby, chemical similarity with vertical neighbors] and period x_{3}[usually, horizontal row; denotes similarity in size with horizontal neighbors, as well as having the same number and type of electron shells as them] and belonging to other 'class'/'category'/'type'/having other properties x_{4}according to scheme/organization pattern/standard/periodic table x_{5}. - aigne
- x
_{1}is an eigenvalue (or zero) of linear transformation/square matrix x_{2}, associated with/'owning' all vectors in generalized eigenspace x_{3}(implies neither nondegeneracy nor degeneracy; default includes the zero vector) with 'eigenspace-generalization' power/exponent x_{4}(typically and probably by cultural default will be 1), with algebraic multiplicity (of eigenvalue) x_{5} - ctaipe
- x
_{1}is an object/construct fulfilling grammatical role/of (syntactic) category x_{2}with (sub)typing/data type/of selma'o x_{3}, having specific properties/features/definition x_{4} - ordre
- x
_{1}is a Linnaean order, between family and class - ratniklesi
- x
_{1}is an atomic element in group x_{2}[usually, vertical column; denotes electron configuration and, thereby, chemical similarity with vertical neighbors] and period x_{3}[usually, horizontal row; denotes similarity in size with horizontal neighbors, as well as having the same number and type of electron shells as them] and belonging to other 'class'/'category'/'type'/having other properties x_{4}according to scheme/organization pattern/standard/periodic table x_{5}.