toxic

adjective

• 1poisonous:the dumping of toxic waste alcohol is toxic to the ovaries
• relating to or caused by poison:toxic hazards toxic liver injury
• very bad, unpleasant, or harmful:a toxic relationship

• 2 Finance denoting or relating to debt which has a high risk of default:toxic debts
• denoting securities which are based on toxic debt and for which there is not a healthy or functioning market:the financial system has become clogged with toxic assets

noun

• poisonous substances.