wishful
Believing something just because you want it to be true.
Wishful describes thinking or believing something is true mainly because you want it to be true, not because there's good evidence for it. When someone engages in wishful thinking, they're letting their hopes cloud their judgment about reality.
A student might have wishful thoughts that tomorrow's math test will be canceled, even though the teacher never cancels tests. A soccer player might wishfully assume they'll make the winning goal without putting in practice time. Someone might wishfully believe their lost library book will magically turn up without actually searching for it.
The word carries a gentle warning: wishing for something doesn't make it happen. There's nothing wrong with hoping for good outcomes, but wishful thinking means fooling yourself instead of facing facts. If you wishfully assume you'll ace a spelling bee without studying, you're setting yourself up for disappointment.
Notice the difference between having hopes and being wishful. You can hope for sunny weather on your field trip while still packing an umbrella. That's smart. But if you wishfully insist it won't rain and refuse to bring the umbrella despite storm clouds gathering, you're ignoring reality because it's inconvenient. The key is keeping your eyes open to what's actually happening while still working toward what you want.