Where does “sumar” come from?

sumar (Bikol Central) comes from Spanish sumar, from Medieval Latin summo, from Latin summa, from Latin summus, from Proto-Italic supemos, from Proto-Indo-European (s)úp-m̥mo-s, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “sumar”, step by step

StepLanguageWordMeaning
1Spanishsumarto add; To add, to add up; to join up
2Medieval Latinsummo—
3Latinsummatop, summit, highest point or place; the...
4Latinsummushighest, greatest, the most high; top, on top
5Proto-Italicsupemos—
6Proto-Indo-European(s)úp-m̥mo-s—
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-—
Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Indo-European (s)úp-m̥mo-s →