file (for holding papers); binder insert
Refers to a paper or document that is bound or filed into a binder, folder, or book. Often used in office or stationery contexts.
See also: ファイル
This file has many inserts.
Punch holes for filing.
bound-in supplement
Standard kanji spelling.
Mixed kana-kanji spelling, commonly seen.
Variant without okurigana, less common but valid.
Formed from 綴じ, the continuative form of 綴じる “to bind,” and 込み, from 込む “to put into.”