Marks an endpoint of a quote/string/expression and specifies that (relative to the original) the quote/string/expression so marked is complete, accurate, and well-portrayed by the quote/string/expression on the relevant side of the excerpt, including wrt all relevant information and when factoring in the content and context of the quotation-external discourse in which said quote/string/expression appears.
Must be adjacent to a quotation marker (including terminator or delimiter) or "sedu'u" or similar; it attaches to the/such a marker such that it external to the scope of the quote/expression produced/contained/terminated by that marker. For example, in "lu mu'o'u lu coi li'u li'u mu'o'u", the first instance of this word attaches to the second "lu" (because it is inside the quotation produced by the first "lu") and the second instance of this word attaches to the second instance of "li'u"; it cannot appear adjacent to "coi" in this example and yet function in application to the expressed quotation markers because it would then be inside all of the available quotations (nested, in this case), although such is allowed as a pure string (because being able to quote an expression such as "He did say "mu'o'u"" is utile). In a quotation (such as a "lu"-"li'u" quotation) with two markers (initiation and termination), even if one of them is implicit: if this word appears before the quote (at its initiation), then it means that there is no relevant and material information preceding the original version of the presented quote which would drastically alter its interpretation (for example: if the original is "not big", then "big" is technically a quote/substring thereof but there is information prior to this substring which materially alters the interpretation, namely "not"); if the word appears after the quote (at its termination), then it means that there is no relevant and material information following the original version of the presented quote which would drastically alter its interpretation (for example: if the original is "he chose the men and the women" but the presented quote/substring is "he chose the men" (in a context such that sexism is being accused), then there is information following the presented quote/substring which alters the interpretation, namely "and the women"); note that the interpretation-altering information need not immediately precede or follow the presented quote. For singly-marked quotes (such as "zo") it means that the presented quote/string/expression is complete on both ends (including being the complete word / all relevant rafsi in a lujvo).