Hazard

优选词，正式主题词

1. A source of danger or risk. (Ontobee, NCI Thesaurus OBO Edition). 2. Set of inherent properties of a substance, mixture of substances, or a process involving substances that, under production, usage, or disposal conditions, make it capable of causing adverse effects to organisms or the environment, depending on the degree of exposure; in other words, it is a source of danger. (IUPAC) 3. The effect of unpredictable and unanalyzable forces in determining events (Merriam-Webster dictionary)