noun
ripple; wavelet
Refers to a small wave or ripple on the surface of water. Often used in descriptions of calm water or gentle movement.
風がやんで、湖面には小波が立つだけだった。
The wind died down, and only ripples formed on the lake surface.
小波が静かに岸に打ち寄せていた。
Small waves were gently lapping against the shore.