<span class="searchmatch">authenticīs</span> dative/ablative masculine/feminine/neuter plural of authenticus...
<span class="searchmatch">authenticī</span> inflection of authenticus: nominative/vocative masculine plural genitive masculine/neuter singular...
<span class="searchmatch">authenticīs</span> accusative authenticum authenticam authenticum authenticōs authenticās authentica ablative authenticō authenticā authenticō <span class="searchmatch">authenticīs</span> vocative...