1. young and inexperienced

e.g. a fledgling enterprise
a fledgling skier
an unfledged lawyer

Synonym: fledglingcallow

2. (of an arrow) not equipped with feathers

e.g. shot an unfledged arrow

Synonym: fledgelessunvaned

3. (of birds) not yet having developed feathers

e.g. a small unfledged sparrow on the window sill

Synonym: immature