Where does “высокоскоростной” come from?

высокоскоростной (Russian) comes from Russian высо́кий, from Old East Slavic вꙑсокъ, from Proto-Slavic vysokъ, from Proto-Slavic -okъ, from Proto-Slavic -kъ, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

высокоскоростной (Russian): high-speed

Definitions

  1. high-speed

Ancestry of “высокоскоростной”, step by step

высокоскоростной traces back through two separate lines of ancestry.

via Russian высо́кий

StepLanguageWordMeaning
1Russianвысо́кийhigh
2Old East Slavicвꙑсокъhigh; tall
3Proto-Slavicvysokъhigh; tall
4Proto-Slavic-okъFrom adjectives, forms a carrier of the...
5Proto-Slavic-kъDeverbal, forms token nouns; From expressive or...
6Proto-Indo-European-kosCreates deadjectival and desubstantival...

via Russian ско́рость

StepLanguageWordMeaning
1Russianско́ростьspeed
2Russian-ость-ness, -ity
3Proto-Slavic-ostьUsed with adjectival stems to form abstract...
Every word from Proto-Indo-European -kosEvery word from Proto-Slavic -kъEvery word from Proto-Slavic -okъ