noun
tsunami; tidal wave
A large ocean wave caused by an earthquake or other underwater disturbance. 'Tidal wave' is a common but scientifically inaccurate English gloss; 'tsunami' is preferred.
地震の後、大きな津波が沿岸の町を襲った。
After the earthquake, a large tsunami struck the coastal town.
津
A tsunami warning was issued, so we evacuated to higher ground.