adjective
- superlative form of careful; most careful, cautious, or thorough
Usage: nonstandard; informal
Examples
- She was the carefullest driver in the family.
- He made the carefullest preparations for the trip.
- Of all the students, Maria was the carefullest with her homework.
- The carefullest examination revealed no errors.
- Even the carefullest planning couldn’t prevent the delay.