<span class="searchmatch">upstayed</span> simple past and past participle of upstay stayed up...
<span class="searchmatch">upstaying</span> present participle and gerund of upstay staying up...
stayed up simple past and past participle of stay up <span class="searchmatch">upstayed</span>...
staying up present participle and gerund of stay up <span class="searchmatch">upstaying</span>...
singular simple present upstays, present participle <span class="searchmatch">upstaying</span>, simple past and past participle <span class="searchmatch">upstayed</span>) (now rare) To sustain, support. 1590, Edmund Spenser...