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Lacking adult maturity or experience; immature: a callow young man.

[Middle English calwe, bald, from Old English calu.]

cal′low·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.callowness - lacking and evidencing lack of experience of life
immatureness, immaturity - not having reached maturity
References in classic literature ?
It advertised his callowness--a callowness sheer and unutterable.
This is about Brown's competence and experience against Cameron's callowness and inexperience, the Labour man's promise of a fairer more prosperous Britain.
And while the small details, as ever, will decide the destiny of the game all Europe is waiting to see, the contrast between his experience and Guardiola's managerial callowness could not have been more marked.
Zamora exploited De Laet's callowness with an outstanding and dominant display, while Zoltan Gera and Damien Duff stopped United playing their way out.
None of those qualities were on display at Upton Park, as the helpless Benitez watched his side collapse, showing a callowness that was indefensible.
In this case, Mr Murphy's callowness and susceptibility to peer pressure were the root cause of his departure from the standards expected from him.
Do they speak in such a foolish fashion through simple callowness - because they have not yet experienced truly memorable events?