A / addĭtāmentum
noun

addĭtāmentum

gen. addĭtāmenti · gender neuter · decl. 2nd
an addition; accession; increase
an addition, accession, increase: inimicorum, * Cic. Sest. 31, 68: vitae, Sen. Ep. 17, 6: praeter nomen nihil est additamenti, Pseud.Sall. ad Caes. de Rep. Ord. 2: pretii, App. M. 9, 6.