<span class="searchmatch">lūctuum</span> genitive plural of lūctus...
singular plural nominative lūctus lūctūs genitive lūctūs <span class="searchmatch">lūctuum</span> dative lūctuī lūctibus accusative lūctum lūctūs ablative lūctū lūctibus vocative lūctus...