on the verge of

on the verge of (doing) (something)

Closely approaching some action or outcome; very nearly at the point at which something will happen. After weeks of failed experiments, I think we're finally on the verge of a breakthrough.
See also: of, on, verge
Farlex Dictionary of Idioms.

on the verge of

Close to, on the brink of, as in I was on the verge of calling the doctor when he suddenly got better, or Sara was on the verge of tears when she heard the news. This term uses verge in the sense of "the brink or border of something." [Mid-1800s]
See also: of, on, verge
The American Heritage® Dictionary of Idioms by Christine Ammer.

on/to the verge of something/of doing something

at or close to the point or time when somebody does something or something happens: She was on the verge of tears. We’re on the verge of signing a new contract.
See also: of, on, something, verge
Farlex Partner Idioms Dictionary
See also:
  • on the verge
  • on the verge of (doing) (something)
  • on/to the verge of something/of doing something
  • verge
  • hold off
  • be (well) on the/(one's) way to/towards (something)
  • be on the/your way to/towards something
  • be going on (for) (something)
  • be going on something
  • getting there
References in periodicals archive
Record-breaking Daw Mill Colliery, near Nuneaton, is on the verge of a pounds 100million-plus investment programme which promises to safeguard its future for years.