Where does “посерьёзнеть” come from?

посерьёзнеть (Russian) comes from Russian серьёзнеть, from Russian серьёзный, from French sérieux, from Latin sēriōsus, from Latin sērius, from Latin sērus, from Proto-Italic swerjos, from Proto-Indo-European swer-yo-s — to ache; to fester; wound; injury.

посерьёзнеть (Russian): to get serious, to become serious

Definitions

  1. to get serious, to become serious

Ancestry of “посерьёзнеть”, step by step

StepLanguageWordMeaning
1Russianсерьёзнетьto get serious, to become serious
2Russianсерьёзныйserious, earnest; serious, grave, important;...
3Frenchsérieuxserious; ?; really? for real?
4Latinsēriōsusserious
5Latinsēriusgrave; earnest; serious
6Latinsēruslate, too late
7Proto-Italicswerjos
8Proto-Indo-Europeanswer-yo-s
9Proto-Indo-Europeanswer-to ache; to fester; wound; injury
Every word from Proto-Indo-European swer-Every word from Proto-Indo-European swer-yo-sEvery word from Proto-Italic swerjos