ciksi -cki- gismu

x1 (person) explains x2 (event/state/property) to x3 with explanation x4 (du'u).

Explanation x4 is an underlying mechanism/details/purpose/method for x2 (= velcki for reordered places), generally assumed to be non-obvious; metaphorical usage with the various causal relations (i.e. jalge, mukti, krinu, rinka, nibli, zukte) is possible, but the non-obviousness, and the existence of an explainer with a point of view makes this word not a simple expression of cause. See also cipra, danfu, jalge, jinvi, krinu, mukti, nabmi, preti, rinka, sidbo, zukte, tavla.

In notes:

cipra
x1 (process/event) is a test for/proof of property/state x2 in subject x3 (individ./set/mass).
danfu
x1 is the answer/response/solution/[reply] to question/problem x2.
jalge
x1 (action/event/state) is a result/outcome/conclusion of antecedent x2 (event/state/process).
jinvi
x1 thinks/opines x2 [opinion] (du'u) is true about subject/issue x3 on grounds x4.
krinu
x1 (event/state) is a reason/justification/explanation for/causing/permitting x2 (event/state).
mukti
x1 (action/event/state) motivates/is a motive/incentive for action/event x2, per volition of x3.
nabmi
x1 (event/state) is a problem to/encountered by x2 in situation/task/inquiry x3.
preti
x1 (quoted text) is a question/query about subject x2 by questioner x3 to audience x4.
rinka
x1 (event/state) effects/physically causes effect x2 (event/state) under conditions x3.
sidbo
x1 (idea abstract) is an idea/concept/thought about x2 (object/abstract) by thinker x3.
tavla
x1 talks/speaks to x2 about subject x3 in language x4.
zukte
x1 is a volitional entity employing means/taking action x2 for purpose/goal x3/to end x3.
ckipinka
x1 (text) is a commentary/annotation/exegesis about paragraph x2 expressed by x3 to audience x4
terlisri
l3 tells/narrates about subject l2 with narration l1 to audience l4.
tolmifygau
g1 deciphers m1 into m2 out of coding system m3.
velcki
x1 is an explanation of x2 (event/state/property) to x3 by x4.
glosa
x1 is a gloss (brief explanatory note or translation) of x2 (text)
do'au (exp!)
pro-sumti whose referent's identity may be chosen by the listener
ente'ori
x1 (proposition) is a theory of x2 (proposition); x1 (proposition) is a system of explanations of structure, basic principles or behavior of x2 (proposition)
ermenefti
x1 does hermeneutics/exegesis analysis of x2 (text); x1 interprets x2 as a given wisdom; x1 is an exegete