Where does “скоростной” come from?

скоростной (Russian) comes from Russian ско́рость, from Russian -ость, from Proto-Slavic -ostь — Used with adjectival stems to form abstract...

скоростной (Russian): speed, high-speed; fast

Definitions

  1. speed, high-speed; fast

Ancestry of “скоростной”, step by step

StepLanguageWordMeaning
1Russianско́ростьspeed
2Russian-ость-ness, -ity
3Proto-Slavic-ostьUsed with adjectival stems to form abstract...
Every word from Proto-Slavic -ostь →Every word from Russian -ость →Every word from Russian ско́рость →