i Register
In some senses, atter is marked as archaic, figuratively, UK. Watch for register when choosing this word.
noun
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.
verb
to venom; sting
to discharge, as a sore; clot; curdle; cake