What is the meaning of Atter?

Poison, venom, especially of a venomous animal.

Pus, corrupt or morbid matter from a sore or wound.

Epithelium produced on the tongue.

A scab; a dry sore.

To venom; sting.

To discharge, as a sore; clot; curdle; cake.

again

again

aft (in the back of a boat)

again

Source: wiktionary.org