brink brink /ˈbrɪŋk/

noun

1. () A region marking a boundary  ( threshold , brink , verge )
   a region marking a boundary
     The mountaineer carefully approached the edge of the cliff, teetering on the brink.
   The mountaineer carefully approached the edge of the cliff, teetering on the brink.
   
2. The limit beyond which something happens or changes  ( brink , verge )
   the limit beyond which something happens or changes
    On the verge of tears
   on the verge of tears
    On the brink of bankruptcy
   on the brink of bankruptcy
   
3. The edge of a steep place  ( brink )
   the edge of a steep place