naive
Trusting too easily because of not much experience or knowledge.
Naive means lacking experience or knowledge about how the world really works, often leading someone to trust too easily or believe things that aren't true. A naive person might think that just because someone says something, it must be true, or that everyone they meet has good intentions.
Being naive isn't the same as being unintelligent. A brilliant student might be naive about friendship if they assume that everyone who acts friendly genuinely cares about them. Someone might be naive about money if they believe a deal that sounds too good to be true. A child who thinks adults never make mistakes or lie is being naive about human nature.
The word often suggests innocence or inexperience rather than stupidity. When you're new to something, whether it's a school, a sport, or a situation, you might make naive assumptions because you haven't learned yet how things actually work. A naive chess player might not recognize an obvious trap. A naive shopper might fall for a scam that experienced buyers would spot immediately.
As people gain experience, they typically become less naive. They learn to question claims, recognize when someone might not be telling the truth, and understand that the world is more complicated than it first appeared. Growing less naive doesn't mean becoming cynical or suspicious of everyone. It means developing wisdom and judgment through real experience.