At risk to be won or lost, as in We have a great deal at stake in this transaction. This phrase uses stake in the sense of something that is wagered. Shakespeare used it in Troilus and Cressida (3:3): “I see my reputation is at stake.” [Late 1500s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.