1. superlative form of naive; lacking experience, wisdom, or judgment; easily deceived or tricked
Usage: superlative degree of the adjective 'naive'
2. superlative form of naive; showing or characterized by a lack of critical thinking or realism
Usage: often used to describe beliefs, approaches, or perspectives that are overly simplistic

Examples

• She was the naivest person in the room, believing every word of the salesman's pitch.
• His naivest assumption was that everyone would act with good intentions.
• The naivest approach to the problem ignored all the practical constraints.
• Of all the candidates, he seemed the naivest about how politics actually works.
• Her naivest belief was that hard work alone would guarantee success.
• The naivest interpretation of the contract led to serious misunderstandings later.