The act of putting someone into danger, or the condition of being in danger(noun)
The exposure of someone, especially a child, to danger or harm(noun)
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Use "endangerment" in a sentence
"Under a Supreme Court ruling, the so-called endangerment finding is needed before the EPA can regulate carbon dioxide and five other greenhouse gases released from automobiles, power plants, and factories under the federal Clean Air Act. The EPA signaled last April that it was inclined to view heat-trapping pollution as a threat to public health and welfare and began to take public comments under a formal rulemaking."
"Last week, the EPA's administrator, Stephen Johnson, announced plans to seek public comment on possible regulation of greenhouse gases, setting in motion a process that would likely delay a so-called endangerment finding for an indefinite period."
"They can -- they can find him guilty of this reckless endangerment, which is a misdemeanor."