ta'o UI3 cmavo

discursive: by the way - returning to main point.

See also denpa, cneterta'a.

On affix form:

tanbo
x1 is a board/plank [3-dimensional long flat rectangle] of material x2.

In notes:

tsekane
x1 (linear manifold, vector, etc.) is/lies secant to x2 (object, surface, curve, manifold, etc.) passing through or toward points/loci x3 (set of intersected points), by standard/definition/in system x4.
zo'anjo
x1 (linear manifold, vector, etc.) is/lies tangent to x2 (object, surface, curve, manifold, etc.) at point/locus x3, by standard/definition/in system x4.