Left radical
氵 is the side-form of
水 (water), three drops falling vertically. Marks
溅 as a water action — splashing, spraying. Same radical anchors the huge water-verb family:
流 (flow),
浇 (pour),
泼 (splash),
滴 (drip),
洒 (sprinkle). When liquid moves,
氵 is on the left.