x_{1} (linear manifold, vector, etc.) is/lies tangent to x_{2} (object, surface, curve, manifold, etc.) at point/locus x_{3}, by standard/definition/in system x_{4}.

No necessary implication of co-directionality. Prone to mathematical/geometric generalization. It can be used metaphorically as in English for a line of discussion (x_{1}) which only barely relates to or touches the general topic or discussion (x_{2}), the latter acting as the primary/main/current/relevant/focal topic or discussion, due to or at a connecting point/detail/particular subtopic/idea (x_{3}), with x_{1} being an irrelevant or unimportant or peripherally branching line of thought. See also: panra, kukru; tanjo, zo'a, tsekane; ta'o.

- tsekane
- x
_{1}(linear manifold, vector, etc.) is/lies secant to x_{2}(object, surface, curve, manifold, etc.) passing through or toward points/loci x_{3}(set of intersected points), by standard/definition/in system x_{4}.