Where does “sidebar comment” come from?

sidebar comment (English) comes from English sidebar, 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 — to satiate, satisfy.

sidebar comment (English): An unnecessary, often argumentative remark made by an attorney or witness during a trial or deposition

Definitions

  1. An unnecessary, often argumentative remark made by an attorney or witness during a trial or deposition

Ancestry of “sidebar comment”, step by step

sidebar comment traces back through two separate lines of ancestry.

via English sidebar

StepLanguageWordMeaning
1EnglishsidebarA short news story printed alongside a larger...
2EnglishSideA bounding straight edge of a two-dimensional shape
3Middle Englishsidecustom
4Old Englishsīdeside, flank
5Proto-West Germanic*sīdāside
6Medieval Latinsida
7Late LatinsetaAlternative form of saeta; hair, bristle; bristle
8Latinsaetaa bristle, hair on an animal; silk
9Proto-Italicsaitā
10Proto-Indo-Europeanséh₂ito-
11Proto-Indo-Europeansh₂ey-to bind, fetter
12Proto-Indo-Europeanseh₂-to satiate, satisfy

via English comment

StepLanguageWordMeaning
1EnglishcommentA spoken or written remark; A remark embedded in...
2Middle Englishcoment
3Old Frenchcomentcommentary
4Old French-mentUsed to form adverbs, most of the time equivalent...
5Latin-mentuminstrument, medium, or result of; e.g....
6Latin-mentanominative plural of -mentum; accusative plural...
7Proto-Indo-European-mn̥Creates action nouns or result nouns from verbs
Every word from Proto-Indo-European seh₂-
sidebar comment — Etymology, Origin & Word History | Etymology Explorer