adjective: Highly offensive; inspiring and deserving hatred.
From Latin odium (hatred), from odisse (to hate). Ultimately from the Indo-European root od- (to hate) that is also the source of the words annoy, noisome, and ennui.
USAGE: "All over the US there are people whose lives are being destroyed for lack of proper health care provision, and there is no sight more odious than the rich, powerful, and arrogant trying to keep it that way."Simon Hoggart; Why the American Right Make Me Sick; The Guardian (London, UK); Aug 15, 2009.