appending

/AH0 P EH1 N D IH0 NG/
verb
  1. 1

    To hang or attach to, as by a string, so that the thing is suspended

    โ€œAn inscription was appended to the column.โ€

  2. 2

    To add, as an accessory to the principal thing; to annex

    โ€œnotes appended to a book chapterโ€

  3. 3

    To write more data to the end of a pre-existing file, string, or other object.

Source: https://en.wiktionary.org/wiki/append, https://en.wiktionary.org/wiki/appending