The root is care.
The word is 'cinch'.
Eureka!!!
precaution
Pedicure
Action
The root word "care" combined with the suffix "-less" creates the word "careless," meaning without care or consideration.
The word done is an adjective. It means to be ready or fully spent.
That word is "event."
Repeated and iterated are words that mean done again.
The root word of "carefully" is "care," which means to be concerned or attentive.
care, to get away from danger