<span class="searchmatch">interfēcerās</span> second-person singular pluperfect active indicative of interficiō...
interfēcimus interfēcistis interfēcērunt, interfēcēre pluperfect interfēceram <span class="searchmatch">interfēcerās</span> interfēcerat interfēcerāmus interfēcerātis interfēcerant future perfect...