氷
こおり · koori · JLPT N3 · noun
ice
🧊 氷 = 水 water + one extra dot: a chip of frost, so water turned to ice
氷 is 水 (water) with one added stroke at the top left, a dot that comes from the ice radical 冫. Its Chinese relative 冰 shows the same idea. Koori also sounds a bit like cooler, which is where ice goes.