x1 is linked by binary predicate x2 (ka) to x3. which in turn is linked by x2 to x4, which in turn is linked by x2 to x5, ...
Open-ended terbri structure of arbitrarily many terms. Functions in a manner similar to "jutsi", "tcaudu", etc. - and, indeed, can be used in order to define each of them in terms of a simple binary operator. Does not imply acyclity or geodecicity of the path through the submitted sumti. Lack of gaps (i.e.: skipping) is implied at the relevant conceptual level (for example: the skull can be so connected to the distal bone of a finger via the sequence of bones which connect them just fine - individual atoms do not need to be listed; however, skipping a bone is could be wrong, depending on context and what the conceptual resolution for the linking objects is). Similar to ".utka" itself, but the list is not a single object which is submitted to a sumti slot of this word; thus the list can be open-ended or even explicitly or implicitly infinite.