Where does “side mirror” come from?

side mirror (English) comes from English Side, from Middle English side, from Old English sīde, from Proto-West Germanic *sīdā, from Medieval Latin sida, from Late Latin seta, from Latin saeta, from Proto-Italic saitā — to satiate, satisfy.

side mirror (English): Synonym of wing mirror

Definitions

  1. Synonym of wing mirror

Ancestry of “side mirror”, step by step

side mirror 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 mirror

StepLanguageWordMeaning
1EnglishmirrorA smooth surface, usually made of glass with...
2Middle EnglishmirourA mirror, looking-glass, or other reflective...
3Old Frenchmireormirror; a typical example
4Old Frenchmirerto look at; to watch
5Latinmīrorto be astonished at, marvel at, admire, be amazed at, wonder at
6Latinmīruswonderful, marvelous, amazing, surprising, miraculous
7Proto-Italicsmeiros
8Proto-Indo-Europeansméyroslaughing, smiling
9Proto-Indo-Europeansmey-to smile; to smear, stroke, wipe, rub; to be...
Every word from Proto-Indo-European seh₂-Every word from Proto-Indo-European sh₂ey-Every word from Proto-Indo-European séh₂ito-