這兩個詞的意思都是“感激、感恩”，一般可以通用。gratitude更常用一些。
前者一般都是比較籠統廣義的表達中用，後者一般用在個人感情表達中。
gratitude: The quality or condition of being grateful
gratefulness: The quality of being grateful
The abstract noun gratitude comes from Medieval Latin gratitudo, “thankfulness.”
The adjective grateful comes from an obsolete adjective grate, “agreeable, thankful,” which came from a Latin adjective, gratus, “pleasing.” Gratefulness is an abstract noun formed by adding the suffix -ness to grateful.
這兩個詞的意思都是“感激、感恩”，一般可以通用。gratitude更常用一些。 前者一般都是比較籠統廣義的表達中用，後者一般用在個人感情表達中。 gratitude: The quality or condition of being grateful gratefulness: The quality of being grateful The abstract noun gratitude comes from Medieval Latin gratitudo, “thankfulness.” The adjective grateful comes from an obsolete adjective grate, “agreeable, thankful,” which came from a Latin adjective, gratus, “pleasing.” Gratefulness is an abstract noun formed by adding the suffix -ness to grateful.