krinu -rin-ki'u- gismu

x1 (event/state) is a reason/justification/explanation for/causing/permitting x2 (event/state).

See also ciksi, rinka, nibli, mukti, se jalge, te zukte, cmavo list ki'u, bapli.

In definition:

ki'u
krinu modal, 1st place (justified by) justifiably; because of reason ...
ki'unai
krinu modal, 1st place despite reason ...
seki'u
krinu modal, 2nd place reason therefore ...
seki'unai
krinu modal, 2nd place reason nevertheless ...

In notes:

bapli
x1 [force] (ka) forces/compels event x2 to occur; x1 determines property x2 to manifest.
ciksi
x1 (person) explains x2 (event/state/property) to x3 with explanation x4 (du'u).
jalge
x1 (action/event/state) is a result/outcome/conclusion of antecedent x2 (event/state/process).
mukti
x1 (action/event/state) motivates/is a motive/incentive for action/event x2, per volition of x3.
nibli
x1 logically necessitates/entails/implies action/event/state x2 under rules/logic system x3.
rinka
x1 (event/state) effects/physically causes effect x2 (event/state) under conditions x3.
zukte
x1 is a volitional entity employing means/taking action x2 for purpose/goal x3/to end x3.
lujrinsku
x1=c1 (person) justifies/expresses justification x2=k2 for x3=p1's complicated-ness in aspect x4=p2 to audience x5=c3 via expressive medium x6=c4.
lujyki'u
x1=k1 (abstract) justifies x2=p1's complicated-ness in aspect x3=p2.
senki'u
x1=k1 justifies x2=s1's doubt/skepticism toward x3=s2 (du'u).