A word or phrase in English that expresses gratitude with an appreciation and happiness feeling beyond plain gratefulness is "overwhelmed with gratitude." This phrase conveys the idea that the person is not only thankful but deeply moved and filled with joy or happiness due to the extent of the gratitude they feel. It emphasizes the emotional intensity of their appreciation. For example:
"I am overwhelmed with gratitude for all the support and kindness I've received."
Another phrase that carries a similar sentiment is "filled with immense gratitude." It indicates a profound sense of thankfulness and happiness that goes beyond the typical expression of gratitude. For example:
"I am filled with immense gratitude for this wonderful opportunity."
In both cases, the words "overwhelmed" and "immense" convey the heightened emotional state, signifying more than just a simple thank you.