Where does “-е” come from?

-е (Old Novgorodian) comes from Proto-Slavic -ъ, from Proto-Indo-European -om, from Proto-Indo-European -o-.

Ancestry of “-е”, step by step

StepLanguageWordMeaning
1Proto-Slavic-ъ*poteťi → *potokъ; *teťi → *tokъ; *gňiti →...
2Proto-Indo-European-omemphatic suffix or postpositive particle
3Proto-Indo-European-o-—

Words derived from “-е”

Every word from Proto-Indo-European -o- →Every word from Proto-Slavic -ъ →Every word from Proto-Indo-European -om →