The story
- Proto-Indo-European*sem-
- Proto-Indo-European*s(e)m-eh₂-
- Proto-Indo-European*sm̥-h₂-ór-o-
- Proto-Germanic*sumaraz
- Proto-West Germanic*sumar
- Old Englishsumor
- Middle Englishsomer
- Englishsummer
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todaysummerlike
Etymology from Wiktionary, CC BY-SA 4.0.