succumbus Save Could not find succumbis in Logeion dictionaries. succumbis Noun: masculine dative plural, Noun: masculine ablative plural of succumbus succumbis Verb: present active indicative 2nd singular of succumbo See succumbis in Morpho Lewis & Short succumbus (subc-), i, m., a boundary-stone, Auct. Limit. pp. 265 and 302 Goes.