Where does “semelfactivus” come from?

semelfactivus (New Latin) comes from Latin semel, from Proto-Indo-European sm̥-meh₁lom, from Proto-Indo-European sem- — together, one.

Ancestry of “semelfactivus”, step by step

semelfactivus traces back through two separate lines of ancestry.

via Latin semel

StepLanguageWordMeaning
1Latinsemelonce, a single time
2Proto-Indo-Europeansm̥-meh₁lomone time
3Proto-Indo-Europeansem-together, one

via Latin factum

StepLanguageWordMeaning
1Latinfactumfact, deed, act, doing; achievement; accusative...
2Proto-Indo-Europeandʰeh₁-to do, put, place
Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European sm̥-meh₁lom →Every word from Latin semel →