Where does “jocoserious” come from?

jocoserious (English) comes from English serious, from Middle English seryows, from Old French serieux, from Medieval Latin seriosus, from Latin sērius, from Latin sērus, from Proto-Italic swerjos, from Proto-Indo-European swer-yo-s — to ache; to fester; wound; injury.

jocoserious (English): Simultaneously jocular and serious; mixing mirth...

Definitions

  1. Simultaneously jocular and serious; mixing mirth...

Ancestry of “jocoserious”, step by step

jocoserious traces back through two separate lines of ancestry.

via English serious

StepLanguageWordMeaning
1EnglishseriousWithout humor or expression of happiness; grave...
2Middle Englishseryows
3Old Frenchserieux
4Medieval Latinseriosusserious
5Latinsēriusgrave; earnest; serious
6Latinsēruslate, too late
7Proto-Italicswerjos
8Proto-Indo-Europeanswer-yo-s
9Proto-Indo-Europeanswer-to ache; to fester; wound; injury

via English jocose

StepLanguageWordMeaning
1Englishjocosegiven to jesting; habitually jolly; playful;...
2Latiniocōsusfunny, full of jesting, jocose, humorous, jokey, light-hearted
3Latiniocusa joke, jest; a form of amusement; pastime, sport
4Proto-Italicjokosword, saying
5Proto-Indo-Europeanyokosword, utterance
6Proto-Indo-Europeanyek-to utter
Every word from Proto-Indo-European swer-Every word from Proto-Indo-European swer-yo-sEvery word from Proto-Italic swerjos