波 - waves, billows, Poland

raging waves; stormy seas

tsunami; tidal wave

disturbance; trouble; commotion; uproar; turmoil

waves that remain after the wind has subsided

frequency (esp. of waveforms)

short wave

wave; billow; ripple; breaker; swell

cold wave

ripple; ring on the water

stormy and full of drama; full of ups and downs; with many vicissitudes

Naniwa (former name for Osaka region)

ultrasonic waves; ultrasound