cal·low
adjective/ˈkæləʊ/
/ˈkæləʊ/
(formal, disapproving)- young and without experience
幼稚无经验的；不成熟的 - a callow youth
乳臭未干的年轻人
Oxford Collocations DictionaryCallow is used with these nouns:- youth
Word OriginOld English calu ‘bald’, of West Germanic origin, probably from Latin calvus ‘bald’. This was extended to mean ‘unfledged’, which led to the present sense ‘immature’. - a callow youth