Where does “magsuso” come from?

magsuso (Bikol Central) comes from Bikol Central suso, from Proto-Malayo-Polynesian susu, from Proto-Austronesian susu — breast.

Ancestry of “magsuso”, step by step

StepLanguageWordMeaning
1Bikol Centralsusobreast; teat; udder; to suckle, to nurse
2Proto-Malayo-Polynesiansusubreast
3Proto-Austronesiansusubreast
Every word from Proto-Austronesian susu →Every word from Proto-Malayo-Polynesian susu →Every word from Bikol Central suso →