<span class="searchmatch">rancōribus</span> dative/ablative plural of rancor...
rancor rancōrēs genitive rancōris rancōrum dative rancōrī <span class="searchmatch">rancōribus</span> accusative rancōrem rancōrēs ablative rancōre <span class="searchmatch">rancōribus</span> vocative rancor rancōrēs...