波浪
bō làng · HSK 6
wave
🌊 波 (wave) + 浪 (billow) = wave + breaker
波 means 'wave' and 浪 means 'breaker/billow'; together 波浪 stacks two wave-words into the general term for ocean waves. 浪 also carries a sense of 'unrestrained,' fitting for rolling surf.
浪 — water radical 氵 + 良 (good/phonetic)
浪 is a phono-semantic compound: 氵 (water) gives the meaning and 良 supplies the sound. It originally referred to waves on water, then extended figuratively to anything surging, unrestrained, or wandering — hence modern senses like 'wave,' 'wasteful,' or 'dissolute.'