The Wordnik Word of the Day for August 28, 2012 is
(noun) A rocky place or pit outside the walls of ancient Athens, into which criminals were thrown.
(noun) The abyss; hell.
(noun) Anything that swallows up or devours; the belly; an insatiable glutton or extortioner.
‘Barathrum’ is Latin in origin, and is also the name of a Finnish ‘black doom’ band.