The definition of bashful is someone easily embarrassed or timid or shy.(adjective)
A child hiding behind their parent is an example of bashful.
See bashful in Webster's New World College Dictionary
Origin: (a)bash + -ful
See bashful in American Heritage Dictionary 4
Origin: From Middle English basshe
Origin: , from basshed
Origin: , past participle of basshen, to be discomfited
Origin: , probably variant of abaishen; see abash.
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