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to melt; to thaw; to fuse
to dissolve
「解ける」 has another reading with different meanings.
春が来て庭の雪がゆっくりと解けていく。
The snow is slowly melting.
時間をかけてやっと難しい問題が解けた。
I finally solved the difficult problem.
会議が終わって緊張が解けて笑顔になった。
My tension was relieved and I smiled.