The story
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European*(s)pend-
- Proto-Indo-European*(s)péndeti
- Proto-Italic*pendō
- Latinpendō
- Latinappendō
- Old Frenchapendre
- Middle Englishappenden
- English todayappend
From Latin appendere (“to hang up, suspend on, pay out”), via Old French apendre, appendre, via Middle English appenden; from ad (“on, upon, against”) + pendere (“to suspend, hang”), equivalent to ad- + pend. Compare with Old English appenden, apenden (“to belong”). See also pendant.
Etymology from Wiktionary, CC BY-SA 4.0.