grandmother / matron / mother-in-law / (slang) femme (in a lesbian relationship)
婆
=
女
+
波
:
Bessie Coleman (女) is Pinocchio's (p) mother-in-law(婆). As such she thinks its her obligation to teach him how to ride the waves (波) in the observatory's kitchen (o2).
妈
=
女
+
马
:
The unicorn told his kids Bessy Coleman and Mahatma Gandhi that he will finally reveal to them who their real mother is. In front of the ashram, they meet their mom for a first time, and realize that she is a centaur.