callow \KAL-oh\, adjective:
Immature; lacking adult perception, experience, or judgment.
Those who in later years did me harm I describe as I knew
them then, and I beg any reader to remember that, although
I was hardly callow, I was not yet wise in the ways of the
--Iain Pears, An Instance of the Fingerpost
George Black Jr was grateful that during his protracted
courtship of Betty, his future father-in-law 'bore my
callow unsophistication with benign indulgence'.
--Richard Siklos, Shades of Black
They watched in awe as Revere, at first a callow and
unambitious youth, began to develop into a serious young
man dedicated to books and devoted to his father.
--Sherwin B. Nuland, "The Saint," New Republic, December
Callow is from Old English calu, "featherless, bald."