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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">I agree with you, Jan.  This is the construction often called the "reflexive possessive", rather than just the possessive, to emphasise the subject is the possessor.
<br>
<br>
Not sure how ki-ka- became gla-, historically there must have been reanalysis by analogy of some sort...<br>
<br>
Willem<br>
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<div style="direction: ltr;" id="divRpF731737"><font color="#000000" face="Tahoma" size="2"><b>From:</b> Siouan Linguistics [SIOUAN@listserv.unl.edu] on behalf of Jan Ullrich [jfu@LAKHOTA.ORG]<br>
<b>Sent:</b> Friday, September 13, 2013 2:55 AM<br>
<b>To:</b> SIOUAN@listserv.unl.edu<br>
<b>Subject:</b> Re: source of GL (was BL accent patterns)<br>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">Rory,</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">If the proposed etymology of míyoglas’iŋ is correct then what is involved is a possessive, rather than a vertitive, I think.
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">In possessive forms the instrumental prefix ka- becomes gla-, as in:</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">kaksá ‘to cut sth’ --> glaksá ‘to cut one’s own’</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">kahíŋta ‘to sweep sth’ –> glahíŋta ‘to sweep one’s own’</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">okáštaŋ ‘to pour sth into’ --> ogláštaŋ ‘to pour one’s own into’</span><span style="font-size:11.0pt; font-family:"Microsoft Sans Serif","sans-serif"; color:#1F497D"></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">This is why I think that oglás’iŋ (possessive) comes from okás’iŋ, although the former is not used as an independent lexical unit. It is not uncommon, however,
 that possessives (and other forms) of some verbs are used only in compounds.</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">I think that historically the gla- form originates from the combination of the prefix ki- with the instrumental ka-. I hope that colleagues who have been
 working on the diachronic analyses will correct me if this is not the case.</span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">Jan</span><span style="font-size:11.0pt; font-family:"Tahoma","sans-serif"; color:#1F497D"></span></p>
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