The story
- Proto-Germanic · inherited from*glisnōną
- Proto-West Germanic · inherited from*glisnōn
- Old English · inherited fromglisnian
- Middle English · inherited fromglisnen
- English todayglisten
From Middle English glisnen, glistnen, from Old English glisnian, itself from Proto-West Germanic *glisnōn, while ultimately deriving from Proto-Germanic *glisnōną.
Etymology from Wiktionary, CC BY-SA 4.0.