kulnu -klu- gismu

x1 [mass of ideas, customs, skills, arts] is culture of nation/ethos x2 (mass); x1 is ethnic.

(note that x2 is NOT individual; culture is what is shared among people and is not an individual trait). See also cmavo list ka'u, cmavo list ku'u, natmi, cecmu.

In definition:

rutni
x1 is an artifact; x1 is artificial; x1 is made/caused by people/se kulnu x2; x1 is man-made.
ku'u
kulnu modal, 1st place in culture ...
seku'u
kulnu modal, 2nd place (people) in culture of ...

In notes:

cecmu
x1 is a community/colony of organisms x2.
natmi
x1 is a nation/ethnic group of peoples x2; [people sharing a history/culture].
dzeklu
k1 is classical.
kluce'u
c1 is a society of c2=k2 with cultural aspects k1.
klura'a
s1 pertains to culture of s2=k2
kluske
s1 is social anthropology.
merklu
k1=m1 is US culture.
selklucipra
x1=c1 is a test/shibboleth for determining x2=k2=c3's membership/belonging to culture x3=k1=c2.