Where does “смертоносный” come from?

смертоносный (Russian) comes from Russian смерть, from Old East Slavic съмьрть, from Proto-Slavic sъmьrtь, from Proto-Balto-Slavic su-mirtis, from Proto-Balto-Slavic mirtis, from Proto-Indo-European mértis, from Proto-Indo-European mer- — to die; to disappear; sea, lake, wetland.

смертоносный (Russian): death-bearing, deadly, mortal, fatal

Definitions

  1. death-bearing, deadly, mortal, fatal

Ancestry of “смертоносный”, step by step

смертоносный traces back through two separate lines of ancestry.

via Russian смерть

StepLanguageWordMeaning
1Russianсмертьdeath; dying for
2Old East Slavicсъмьртьdeath
3Proto-Slavicsъmьrtьdeath
4Proto-Balto-Slavicsu-mirtisnatural death
5Proto-Balto-Slavicmirtisdeath
6Proto-Indo-Europeanmértisdeath
7Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland

via Russian носи́ть

StepLanguageWordMeaning
1Russianноси́тьto wear; carry; to bear
Every word from Proto-Indo-European mer-Every word from Proto-Indo-European mértisEvery word from Proto-Balto-Slavic mirtis