Definition: the state of being unhappy Level: B2
她的不快乐对每个人都很明显。
Her ___unhappiness was obvious to everyone.
他们的不快乐可能导致他们的死亡。
Their ___unhappiness can bring about their death.
他试图向朋友隐藏他的不快乐。
He tried to hide his ___unhappiness from his friends.
