Etymograph

English

Summerween

First use appears c.

A blend of summer + Halloween

Proto-Indo-European *sm̥-h₂-ór-o-

Proto-Germanic *sumaraz

Proto-West Germanic *sumar

Old English sumor

Middle English somer

English summer

Scots

English Halloween

The story

First use appears c. 2012. Originally coined in the animated TV series Gravity Falls.

Today it means

name A summertime redux of Halloween.

Language periods are conventional ranges, not dates for this word.

Etymograph / Summerween