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to melt; to thaw; to fuse
to dissolve
アイスクリームが溶けてしまった。
The ice cream has melted.
角砂糖を熱いコーヒーにそっと落とすと、ゆっくりと底から溶けてゆき、やがて全体が均一な甘さに包まれた。
When the sugar cube was gently dropped into the hot coffee, it dissolved slowly from the bottom, until at last the whole was wrapped in a uniform sweetness.
日差しを浴びて雪だるまが溶けた。
The snowman melted in the sunlight.