On grammatical class:

co
tanru inversion operator; "... of type ..."; allows modifier trailing sumti without sumti links.
co'ai'e
Non-committal/agnostic/unassertive/abstaining/neutral tanru inversion.
co'au'e
trivial selbri inversion: does not invert tanru (seltau first/left, tertau second/right).
co'o'e
elliptical/vague/unspecific/generic tanru inversion

In definition:

jibytreicyfamti
x1 is work-heirarchy "uncle/aunt" of x2 via relation/partial ordering x3; x1 is either (in a narrow sense) a direct subordinate of the direct boss/superior/manager of x2's direct boss/superior/manager, or is (in a broader sense) an equal-level co-worker of x2's direct boss/superior/manager (no matter the exact relation).
pavytabjoikijno
k1=t1 is a quantity of/contains/is made of carbon monoxide (CO).
ridjinme
x1 is a quantity of/contains/is made of cobalt (Co).
samjudri
j1 is an adress of / are co-ordinates of computer system / computerized thing j2=s1 in system j3; computerized thing has purpose s2.
tabypavykijno
x1 is a quantity of carbon monoxide (CO)
co'ai
placed after a tanru with CO, following sumti return to the place structure of the left tanru unit.
co'u'o
tanru inversion question: asks for a CO cmavo.
abvorci
x1 is a grandparent of x2 which/who has another grandparent x3 such that x1 is related to x2 by relationship x4, and x1 is related to x3 by relationship x5 which is NOT their mutual mating/intimate partnering, under cultural/personal paradigm x6; x1 and x3 are mutual co-grandparents.
abvroi
x1 is a grandparent of x2 which/who has another grandparent x3 such that x1 is related to x2 by relationship x4, and x1 is related to x3 by mating/intimate partnering relationship x5, under cultural/personal paradigm(s) x6; x1 and x3 are mutually partnered co-grandparents.
cmavrco
x1 is the selma'o "CO".
malternrorci
x1 is an absent or deadbeat co-parent of x2, the 'primary' parent of whom is x1.
ternrorci
x1 is the co-parent of x2 with parent x3.

In notes:

bafcolkercrakre
x1=b1 are sideboards/sideburns/tufts of hair under temple of x2=kerf2=kerl2=c3.
eiksyspeselrirni
x1 is the child of the ex-spouse of x2 by standard x3.
kleivmykai
x1 (set) is a set such that the complement of which (taken in/relative to superset x3=kleivmu3 (set; default: some universal set)) has property/is characterized by x2 (ka).
panryki'i
x1 and x2 have or had (not necessarily simultaneously) the same relationship to x3, that relationship being x4, with the relevant difference(s) between x1 and x2 being x5.
treicytunba
x1 is of the same rank/generation in hierarchical structure x2 by standard/partial ordering/relationships x3.
dindi
x1 is a non-binary-gendered/hermaphrodite/intersexed (probably also can include: asexual, nongendered, indeterminately gendered) individual of species x2 evidencing non-binary-gender trait(s) x3 (ka); x1 is characterized by not following or fitting into some gender-binary.
dinti
x1 is a non-binary-gendered/hermaphrodite/intersexed (probably also can include: asexual, nongendered, indeterminately gendered) individual of species x2 evidencing non-binary-gender trait(s) x3 (ka); x1 is characterized by not following or fitting into some gender-binary.
nonmu
x1 is an agender humanoid person [not necessarily adult].
nunmu
x1 is a non-binary-gendered humanoid person [not necessarily adult]
paznu
x1 is a non-binary-gendered offspring/child of mother/father/parents x2 [not necessarily biological]; x1 is filial (but not a son or daughter)
preri
x1 is a non-binary-gendered parent of x2 [not necessarily biological]
ka'oi
x1 (ka) is obtained from x2 (ka) by uncurrying the first N places
ke'oi
reverses modification order of contained tanru (does not affect lujvo).
ckajrdinti
x1 is a non-binary-gendered individual of species x2 evidencing non-binary-gender trait(s) x3 (ka); x1 is characterized by not following or fitting into some gender-binary.
cletckajiko
x1 is a mathematical set/structure/space/object (use appropriate gadri) such that its (set-/structure-/space-/object-theoretic) complement (in space x3) has property x2 (ka) in space x3
nergaiu
x1 tops (sexual position/role) in aspect x2 (ka)
remrnunmu
x1 is a non-binary-gendered humanoid person [not necessarily adult]
tsekane
x1 (linear manifold, vector, etc.) is/lies secant to x2 (object, surface, curve, manifold, etc.) passing through or toward points/loci x3 (set of intersected points), by standard/definition/in system x4.
zo'anjo
x1 (linear manifold, vector, etc.) is/lies tangent to x2 (object, surface, curve, manifold, etc.) at point/locus x3, by standard/definition/in system x4.
re zei zgabube
x1 is a part of Lojban text representing rule 'selbri-2' according to the first edition of the book 'The Complete Lojban Language'.