x1 and x2 are path-linked by binary predicate x3 (ka) via intermediate steps x4 (ce'o; (ordered) list but not necessarily fully and explicitly specified without skipping/gaps/omissions/implicit terms).
This word is basically the same as ".utka" in terms of its meaning, but partial explicit specification of x4 does not imply complete specification of x4; there may be skipped/elided/implicit terms between those which are specified, possibly including either between x1 and the first-specified term of x4 or between the last-specified term of x4 and x2. Like ".utka", neither acyclicity nor geodesicity is implied, but furthermore: any cycles or off-geodesic path-walking/paths may possibly-also occur in/via/at/with or partially in/via/at/with the omitted/implicit terms of x4. It is not guaranteed/necessary that between any two explicit terms of x4 (or between the endpoint terms thereof and either x1 or x2 respectively) there are any gaps/missing/implicit terms - only the possibility of such is implied/allowed by (the usage of) this word.