Antonyms for the phrase "expressed sorrow" could be positive emotions or expressions such as joy or delight. Other antonyms may include indifference or apathy towards a situation or person, ignorance, or insensitivity to the sorrow expressed. Furthermore, the antonyms could be words that indicate avoiding the expression of sorrow, such as concealing, suppressing, or repressing emotions. Alternatively, antonyms could also be words that contradict sorrowful sentiments, such as happiness, contentment, satisfaction, or fulfillment. Ultimately, there are several possibilities for antonyms for the phrase "expressed sorrow," which are dependent on the context and the tone in which the phrase is used.