What is the prefix in disappointedly?

The prefix in the word "disappointedly" is dis, the word means to deprive an appointment, the root word is appointed. In finding prefix in a particular word note that is it always before the root word by suffix is always found at the end of the root word.

Explanation:

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what makes a hero is someone who tries and acres and then to save people and it’s not their jobs to save them just a normal person that has no experts of saving people would jump in to action without it twice about doing it. me that’s the defection of a hero!