The Collaborative International Dictionary
Imperiling
Imperil \Im*per"il\, v. t. [imp. & p. p. Imperiledor Imperilled; p. pr. & vb. n. Imperiling or Imperilling.] To bring into peril; to endanger.
Wiktionary
imperiling
vb. (present participle of imperil English)
Usage examples of "imperiling".
He didn't need the passengers now, he only needed Bostich, but how could he get the people off the aircraft without imperiling the whole effort?