Where does “mountainside” come from?

Mountainside is a compound of mountain and side, where side derives from Middle English side, Old English sīde, and Proto-Germanic sīdǭ, ultimately from Latin mons meaning mountain.

mountainside (English): The sloping side of a mountain

Definitions

  1. The sloping side of a mountain

Ancestry of “mountainside”, step by step

mountainside traces back through two separate lines of ancestry.

via English Side

StepLanguageWordMeaning
1EnglishSideA bounding straight edge of a two-dimensional shape
2Middle Englishsidecustom
3Old Englishsīdeside, flank
4Proto-West Germanic*sīdāside
5Medieval Latinsida
6Late LatinsetaAlternative form of saeta; hair, bristle; bristle
7Latinsaetaa bristle, hair on an animal; silk
8Proto-Italicsaitā
9Proto-Indo-Europeanséh₂ito-
10Proto-Indo-Europeansh₂ey-to bind, fetter
11Proto-Indo-Europeanseh₂-to satiate, satisfy

via English Mountain

StepLanguageWordMeaning
1EnglishMountaina steam locomotive of the 4-8-2 wheel arrangement
2Middle EnglishmountayneA mountain; a mount or peak; A lump or pile
3Anglo-Normanmontaigne
4Latinmontāniamountainous area
5Latinmontemaccusative singular of mōns; mountain
6Latinmonsmountain, mount; towering mass, heap, great...
7Proto-Indo-Europeanmonti
8PortugueseMontemount; a mountain or large hill
9Old Portuguesemonte
Every word from Proto-Indo-European seh₂-