Wide-eyed

adj.joyful, hopefulwarm

Meaning 1

Showing open wonder, curiosity, or delighted surprise.

Reach for it when praising fresh attention when innocence is not being used to diminish someone

Wide-eyed visitors watched the first turtle reach the sea.

everyday
delighted
when pleasure rather than surprise is central
not when Delight can be familiar and does not imply open astonishment.
warm
curious
when desire to learn matters more than visible amazement
not when Curiosity can be calm and skeptical rather than wide-eyed.
formal
awed
when grandeur or power inspires reverent wonder
not when Awe is more solemn and may include fear.
literary
wonderstruck
when awe has temporarily overwhelmed ordinary attention
not when Wonderstruck is stronger and less suitable for steady curiosity.

Inexperienced and too ready to believe or admire.

Reach for it when describing naivety when the cautionary meaning is genuinely intended

The wide-eyed recruit trusted the impressive title before checking the contract.

everyday
unsuspecting
when someone does not anticipate deception or harm
not when Unsuspecting describes one situation and does not claim general inexperience.
warm
idealistic
when high principles shape hope
not when Idealism can be informed and practical, so it should not be equated with wide-eyed naivety.
professional
naive
when lack of experience impairs judgment
not when Naive is more direct and usually more critical than wide-eyed.
formal
credulous
when willingness to believe weak claims is the exact problem
not when Credulous is harsher and requires evidence of poor skepticism.

wide-eyed wonder
The children watched the eclipse with wide-eyed wonder.
wide-eyed curiosity
Wide-eyed curiosity led Aya to ask how every instrument worked.
wide-eyed newcomer
A wide-eyed newcomer, he learned to check every promised benefit.

Wide-eyed can patronize adults by equating openness with naivety. Use curious or wonderstruck when inexperience is not relevant.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.