Three drops of water on the left — the side-form of
水. Anchors
浪 in the water family alongside
河,
海,
湖,
涛. Carries the meaning core: a wave is a movement of water. Extends metaphorically to
浪费 'wasting' (letting things drift away on the tide) and
浪漫 'romantic / unrestrained' (going wherever the current takes you).