Where does “cyfanswm” come from?

cyfanswm (Welsh) comes from Welsh swm, from Middle English summe, from Old French summe, from Latin summa, from Latin summus, from Proto-Italic supemos, from Proto-Indo-European (s)úp-m̥mo-s, from Proto-Indo-European upó.

cyfanswm (Welsh): total, sum total, aggregate

Definitions

  1. total, sum total, aggregate

Ancestry of “cyfanswm”, step by step

cyfanswm traces back through two separate lines of ancestry.

via Welsh swm

StepLanguageWordMeaning
1Welshswmsum, total
2Middle Englishsumme—
3Old Frenchsumme—
4Latinsummatop, summit, highest point or place; the...
5Latinsummushighest, greatest, the most high; top, on top
6Proto-Italicsupemos—
7Proto-Indo-European(s)úp-m̥mo-s—
8Proto-Indo-Europeanupóunder, below
9Proto-Indo-Europeanh₃ewp-—

via Welsh cyfan

StepLanguageWordMeaning
1Welshcyfanwhole, complete
Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Indo-European (s)úp-m̥mo-s →