What is "periyachi"

Periyachi ( Tamil:பெரியாச்சி) is a malevolent aspect of the Divine Mother in Hinduism. She is also known as Periyachi Amman (amman meaning "Mother") and sometimes called as Periyachi Kali amman and she is associated with another ferocious goddess Kali. Periyachi is the protector of children and is associated with childbirth and pregnancy. Periyachi is usually associated with Hinduism in Singapore and Malaysia.