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to dissolve (paint); to scramble (eggs); to melt (metal, etc.); to mix (water with flour, etc.)
絵の具を水でよく溶いてから使った。
I dissolved the paint well with water.
ボウルに卵を三つ割り入れて溶いた。
I cracked three eggs into a bowl and scrambled them.
絵の具を水で溶いている。
I am dissolving the paint in water.