<span class="searchmatch">diffūderam</span> first-person singular pluperfect active indicative of diffundō...
diffūdistī diffūdit diffūdimus diffūdistis diffūdērunt, diffūdēre pluperfect <span class="searchmatch">diffūderam</span> diffūderās diffūderat diffūderāmus diffūderātis diffūderant future perfect...