One who endangers.

plural of endangerer

plural of endangerment

The act of putting someone into danger, or the condition of being in danger. / (law) The exposure of someone, especially a child, to danger or harm.

(rare) At risk of becoming endangered.

(law) The crime of engaging in conduct that creates a substantial risk of serious physical injury to another person, while disregarding foreseeable consequences to others from that conduct.

(law) The crime of engaging in conduct, through negligence or by malice, that creates conditions that place a child in danger of physical or psychological injury.