What is full form of anamika?

"Anamika" itself is a name and doesn't have a full form. It's a popular name in India, often given to girls.

However, the name "Anamika" is derived from the Sanskrit word "anāmikā" which means "nameless" or "without a name."

So, while there's no full form of the name itself, you could say that its meaning is "nameless."