Where does “síncamas” come from?

síncamas (Philippine Spanish) comes from Spanish jícamas, from Nahuatl xīcama, from Classical Nahuatl xīcamatl.

Ancestry of “síncamas”, step by step

Step	Language	Word	Meaning
1	Spanish	jícamas	—
2	Nahuatl	xīcama	—
3	Classical Nahuatl	xīcamatl	—