bashful
adjective /ˈbæʃfl/
  /ˈbæʃfl/
 - shy and easily embarrassed
- He was too bashful to talk about sex.
 - She looked bashful when he asked her what she wanted.
 - When we asked her if she had a boyfriend, she came over all bashful and wouldn’t say a thing.
 
Word Originlate 15th cent.: from obsolete bash ‘make or become abashed’ (from abash) + -ful.