暗あん礁しょうに乗のり上あげる

expression, ichidan verb

run aground; strike a reef; be stranded on a reef

Literal nautical sense: a ship hits a hidden reef and gets stuck.

• 船ふねは暗あん礁しょうに乗のり上あげて動うごけなくなった。

  The ship ran aground on a reef and became unable to move.

expression, ichidan verb

reach a deadlock; come to a standstill; hit a snag

Idiomatic use: a plan, negotiation, or project encounters an unexpected obstacle and stalls.

• 交こう渉しょうは予よ算さんの問もん題だいで暗あん礁しょうに乗のり上あげた。

  The negotiations hit a snag over budget issues.