brink

/bɹɪŋk/

ot noun

The edge, margin, or border of a steep place, as of a precipice; a bank or edge. the brink of a river
The edge or border He's on the brink of madness.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.