From un- + extendible. <span class="searchmatch">unextendible</span> (comparative more <span class="searchmatch">unextendible</span>, superlative most <span class="searchmatch">unextendible</span>) Not extendible...
extend + -ible. extendible (law) Liable to be taken by a writ of extent. Alternative spelling of extendable. inextendible nonextendible <span class="searchmatch">unextendible</span>...