also: はとう
noun
wave crest; whitecaps
Refers to the top of a wave, often with white foam; used in both literal and figurative contexts.
強い風で波頭が白く砕けている。
The strong wind is making the wave crests break white.
遠くの海にいくつもの波頭が見えた。
We could see many whitecaps far out at sea.
Compound of 波 (nami, 'wave') + 頭 (kashira, 'head'), literally 'wave head'. The reading はとう is the on'yomi version, used in more formal or literary contexts.