The story
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Englishsub-
- Proto-Italic*merks
- Latinmerx
- Latinmercor
- Latinmercāns
- Anglo-Normanmarchaunt
- Middle Englishmarchaunt
- Englishmerchant
- Englishmerchantable
- English todaysubmerchantable
From sub- + merchantable.
Etymology from Wiktionary, CC BY-SA 4.0.