verge on

Could the (thus far) timid trembling give way to a full-on, grand mal seizure?

Late into the night they lingered on the veranda, and he found himself on the verge of confessing all to her.

I drew back from the rim of Writing-On-the-Stone, that set of whispered phrases echoing in my ears.

It was still in the verge of possibility that his son might seek his father in that dismal chamber.

A coward by nature, he had been on the verge of a nervous breakdown before the trial, thinking of what might happen.

This mine is situated in low ground near the verge of the stream, and was at first only worked for gold.