<span class="searchmatch">mancomunándome</span> gerund of mancomunar combined with me...
<span class="searchmatch">mancomunándome</span> mancomunándote mancomunándole, mancomunándose mancomunándonos mancomunándoos mancomunándoles, mancomunándose accusative <span class="searchmatch">mancomunándome</span>...