noun
giant wave; large wave
Refers to an exceptionally large ocean wave, often in contexts like tsunamis, storm surges, or surfing. More specific than 大波 (おおなみ).
サーファーは巨大波に挑戦した。
The surfer challenged the giant wave.
津波による巨大波が沿岸の町を襲った。
A giant wave from the tsunami struck the coastal town.
津波 specifically refers to a tsunami, whereas 巨大波 can describe any extremely large wave, including those caused by storms or other phenomena.
Compound of 巨大 (きょだい, 'giant') and 波 (は, 'wave'). The reading きょだいは follows standard on'yomi for the kanji.