R / rĕtĭnentĭa
noun

rĕtĭnentĭa

gen. rĕtĭnentiae · gender feminine · decl. 1st
retineo, II.
a retaining in the memory; recollection
a retaining in the memory, recollection: actarum rerum, Lucr. 3, 675: nostri, id. 3, 851.