Dictionary

A callow young bird.

A callow or teneral phase of an insect or other arthropod, typically shortly after ecdysis, while the skin still is hardening, the colours have not yet become stable, and as a rule, before the animal is able to move effectively.

An alluvial flat.

Unfledged (of a young bird).

(by extension) Immature, lacking in life experience.

Example: Those three young men are particularly callow youths.

Lacking color or firmness (of some kinds of insects or other arthropods, such as spiders, just after ecdysis); teneral.

Shallow or weak-willed.