Where does “bifocal” come from?

bifocal (English) comes from English bi-, from Latin bi-, from Proto-Italic *dwi- — two, bi-, di.

bifocal (English): Having two focal lengths; Divided into two parts,...

Definitions

  1. Having two focal lengths; Divided into two parts,...

Ancestry of “bifocal”, step by step

StepLanguageWordMeaning
1Englishbi-API; two, paired, both; half
2Latinbi-having two parts; occurring twice
3Proto-Italic*dwi-two, bi-, di

Words derived from “bifocal”

Every word from Proto-Italic *dwi- →Every word from Latin bi- →Every word from English bi- →
bifocal — Etymology, Origin & Word History | Etymology Explorer