The word that would require me to change the "y" to an "i" when adding the suffix "ed" is "hurry".
The "y" in "hurry" has to be changed to an "i" when adding the suffix "ed". The reason why this letter must be changed is because the letter that comes before the "y" in "hurry" is a consonant ("r"). On the other hand, the letters that come before the "y" in the words "betray" "destroy" and "obey" are vowels; therefore, the "y" must not be changed to an"i". Other words similar to "hurry" are "carry" and "try" since the final "y" in these words must also be changed to an "i" when adding the suffix "ed".