Where does “mapos” come from?

mapos (Proto-Brythonic) comes from Proto-Celtic makʷos, from Proto-Indo-European mh₂ḱwos, from Proto-Indo-European meh₂ḱ- — to raise, increase; long.

Ancestry of “mapos”, step by step

StepLanguageWordMeaning
1Proto-Celticmakʷosson
2Proto-Indo-Europeanmh₂ḱwos—
3Proto-Indo-Europeanmeh₂ḱ-to raise, increase; long
Every word from Proto-Indo-European meh₂ḱ- →Every word from Proto-Indo-European mh₂ḱwos →Every word from Proto-Celtic makʷos →