vizo

A real relation you cannot use. Vizo and vidi go back to the same Latin verb videre, and so does vizio at rank 2,698 - a thing seen, whether in the sky or in the head, which is why vizio sits next to inspiri in a way vizo never will. The cousinhood is genuine and completely useless to you as a builder: there is no Esperanto seam here. You cannot cut vizo into vid- plus anything, because the root is viz-, borrowed whole through French, with one narrow meaning attached. The false friends article makes the general case - a resemblance between roots is evidence of nothing on its own.

The document, precisely. A vizo is not the permission to enter, it is the endorsement in the pasporto saying the papers have been examined. Grammatically the verb is vizi, to endorse a document, and the official who does it is the vizanto. Enirvizo is an entry visa, elirvizo an exit visa, trairvizo a transit visa, all built with the prefixes you already have.

Travel vocabulary, congress edition. This word earns its place because Esperanto meetings are international by definition, and every kongreso thread contains somebody asking about one. The set is pasporto, vizo, limo for the border, dogano for customs, and permesi for what the whole apparatus is deciding whether to do.