x_{1} pertains to/is germane/relevant to/concerns/is related/associated with/is about x_{2}.

Also: x_{1} is a question of/treats of x_{2}; can be symmetric, although x_{1} is conventionally more specific or constrained in scope than x_{2}.
See also cmavo list ra'a, ckini, ponse, steci.

- ra'a
- srana modal, 1st place pertained to by ... (generally more specific).
- sera'a
*(comp!)* - srana modal, 2nd place (pertaining to) relevantly; concerning ... (less specific).

- ckini
- x
_{1}is related to/associated with/akin to x_{2}by relationship x_{3}. - cuntu
- x
_{1}is an affair/organized activity involving person(s) x_{2}(ind./mass); x_{1}is x_{2}'s business. - ponse
- x
_{1}possesses/owns/has x_{2}under law/custom x_{3}; x_{1}is owner/proprietor of x_{2}under x_{3}. - steci
- x
_{1}(ka) is specific/particular/specialized/[special]/a defining property of x_{2}among x_{3}(set). - banra'a
- s1 pertains to language of s2=b2
- cemra'a
- s1 pertains to community s2=c2
- gamseti'yra'a
- x
_{1}synaesthetizes qualia x_{2}with qualia x_{3}(but not necessarily the inverse) under conditions x_{4}. - jdara'a
- s1 pertains to religion of s2=l2
- kamra'a
- k
_{1}is the relation of s_{1}to s_{2}. - klura'a
- s1 pertains to culture of s2=k2
- nalra'a
- x
_{1}is irrelevant/unrelated to x_{2}; x_{1}is arbitrary in relation to x_{2}[object of comparison; context or referent]. - nunjo'e
- n
_{1}is an established connection between j_{1}and j_{2}at common locus j_{3}. - prurai
- x
_{1}is/are the earliest, most ancient among x_{2} - ra'arlogji
- x
_{1}is relevant logic / relevance logic, used to deduce/infer x_{2}(du'u) - ra'asku
- x
_{1}says x_{2}to x_{3}via medium x_{4}, on topic / alluding to x_{5}. - selgu'era'a
- s1=sg1 pertains to country s2=sg2
- suvyco'e
- x
_{1}is an abstraction involving x_{2} - tutra'a
- s1 pertains to territory of s2=t2
- clenu
- x
_{1}is an axis/center curve/extended center (or, possibly metaphorically, focus 'point') of x_{2}in sense x_{3} - modju
- x
_{1}(li; number) is congruent to x_{2}(li; number; see description for canonical/traditional/contextless default usage) modulo x_{3}(li; number); \frac(x_{1 - x}is an integer. - fi'ai
*(exp!)* - marks end of prenex in stack-based dialect
- alkai
- x
_{1}is called after property x_{2}by x_{3} - cti'omni
- x
_{1}is omnivore - sidmeme
- x
_{1}is a meme