portend
verb [ T ] formal uk/pɔːˈtend/ us/pɔːrˈtend/
预示，预兆，预告（坏事）
to be a sign that something bad is likely to happen in the future
It was a deeply superstitious country, where earthquakes were commonly believed to portend the end of dynasties. 这是一个很迷信的国家，地震被普遍认为预示着王朝的终结。