そえ物

(1)something added to what you already have; "the librarian shelved the new accessions"; "he was a new addition to the staff"

(2)すでにあるものに付け加えられたもの

(3)a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor"

(4)何かを改善するためにそれに加えられる要素

(1)