feral , we can remember like fear+all =>we all will fear seeing a wild animal.
feral: For Sake of memorizing let think it as beral means cat in bangla. Beral is domestic but feral is not Domestic. May be feral is some other creature like beral.
it sounds like fural ie (furious) means anger, wild .
Everyone fears non-domestic, wild animals
feral= fate haal..in an untamed state
Always firna(rome Around) is not domestic behaviour.
(eral in tamil means kidney)kidney of wild animal.