Where does “неподви́жный” come from?
неподви́жный (Russian) comes from Russian подви́жный, from Russian подви́гать, from Russian подви́нуть, from Russian дви́нуть, from Proto-Slavic dvignǫti, from Proto-Slavic dvigati, from Proto-Slavic d(ъ)vigъ, from Proto-Slavic d(ъ)va — 2.
Ancestry of “неподви́жный”, step by step
Words derived from “неподви́жный”