Origin: Latin suffix -ude
Gratitude has 2 different meanings across 1 category:
a feeling of thankfulness and appreciation
"he was overwhelmed with gratitude for their help"
The state of being grateful.
"Her deep gratitude was evident in the warm smile she gave him after his help."
In plain English: Gratitude is feeling thankful for what you have received from others.
"She expressed her gratitude by writing him a heartfelt thank-you note."
The word entered Middle English as a loanword from the French gratitude, which itself came from the Late Latin term for "thankfulness." This borrowing replaced an earlier, now obsolete form of thanksgiving that existed in Old English.