The story
- Proto-Italic*wre-
- Latinre-
- Proto-Indo-European*leykʷ-
- Proto-Indo-European*linékʷti
- Proto-Italic*linkʷō
- Latinlinquō
- Latinrelinquō
- Old Frenchrelenquir
- Middle Frenchrelinquir
- Middle Englishrelinquisshen
- English todayrelinquish
From Middle English relinquisshen, from the inflected stem relinquiss- of Middle French relinquir, from Latin relinquere, itself from re- + linquere (“to leave”). Compare also Sanskrit रिणक्ति (riṇakti, “to leave”).
Etymology from Wiktionary, CC BY-SA 4.0.