They are not callow like the young of most birds, but more perfectly developed and precocious even than chickens.
Untraveled, naive, even a little callow, we are not surprised to discover the heart of a hero just waiting to be stirred to action.
A rather beefy looking drummer, no callow youth, this.
callow youth with a singular vision?
As a nickname the term "agnostic" was soon misused to cover any and every variation of scepticism, and just as popular preachers confused it with atheism in their denunciations, so the callow freethinker - following Tennyson's path of "honest doubt" - classed himself with the agnostics, even while he combined an instinctively Christian theism with a facile rejection of the historical evidences for Christianity.