What is the meaning of Atter?

poisonous bodily fluid, especially venom of a venomous animal, such as a snake, dragon or other reptile; corrupt or morbid matter from the body, such as pus from a sore or wound; bitter substance, such as bile

moral corruption or corruptness; noxious or corrupt influence, poison to the soul, evil, anger, envy, hatred; destruction, death

epithelium produced on the tongue

a scab; a dry sore

to venom; sting

to discharge, as a sore; clot; curdle; cake

again

A poison or toxin; that which poisons.

Something bitter or acrid-tasting.

Something purulent or pussy.

A malign or corrupting thing.

again

aft (in the back of a boat)

again

Source: wiktionary.org