Left-side 氵 is the water radical, three drops representing 水 in left-side form. It indexes 漏 in the family of water-action chars — leaking, dripping, flowing. The radical alone tells you 漏's core image is liquid escaping. Same family as 河, 海, 流, 滴.
phonetic
屚lòu
rain dripping through a roof
Right-side 屚 supplies the sound (lòu → lòu, identical) and is itself a meaning-rich element: 尸 (roof) over 雨 (rain) — rain coming through the roof. So 漏 doubles up the imagery: the 氵 outside plus a roof-leaking-rain inside, an unusually pictorial phono-semantic compound.
