一觸即發 yī chù jí fā

DEFINITIONS

  1. could happen at any moment
  2. on the verge

CHARACTERS

一 yī
HSK 1
one; a, an; alone
觸 chù touch; butt, ram, gore
即 jí
HSK 4
promptly, quickly, immediately
發 fā issue, dispatch, send out, emit