I had to look up and remind myself about the two possible derivatives of "bendecir" - i.e. bendecido [participle] and bendito [adjective]. Clarification was necessary because I remembered that the future tense of "bendecir" is 'regular' - i.e. "bendeciré" - [unlike decir > diré].
Another 'peculiar' change which might be worth mentioning in this lesson is the way in which "pudrir" becomes "podrido" when forming its past participle.
Of possible interest too, is the pair "corrompido" [participle] as opposed to "corrupto" [adjective]; (we never see "corroto").