ꦥꦸꦂꦤꦩ (Javanese) comes from Malay purnama, from Sanskrit पूर्णिमा, from Sanskrit पूर्णमास्, from Proto-Indo-Iranian pr̥Hnás, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.
ꦥꦸꦂꦤꦩ (Javanese): full moon