勢不可當

Simplified: 势不可当

On the HSK 7-9 vocabulary list, at CEFR level C1.

shìbùkědāng ㄕˋ ㄅㄨˋ ㄎㄜˇ ㄉㄤ

    • impossible to resist (idiom) an irresistible force

Character by character

Sources