endanger

verb

1. (transitive)To put (someone or something) in danger; to risk causing harm to.

   “I hold him but a fool that will endanger / His body [in a duel] for a girl that loves him not”

   “All the other difficulties of his reign only exercised without endangering him.”

   “1877, Louisa May Alcott, Under the Lilacs If you endanger other people's life and liberty in your pursuit of happiness, I shall have to confiscate your arms, boys.”

   “As he passed though the station, he slowed to yell to the signalman, Frank 'Sailor' Bridges: "Sailor - have you anything between here and Fordham? Where's the mail?" Gimbert knew the mail train was due, and he didn't want to endanger another train with his burning bomb wagon.”

2. (obsolete, transitive)To incur the hazard of; to risk; to run the risk of.

   “He that turneth the humours back […] endangereth malign ulcers.”