As a Noun:
1. The quality of being nervous and uncomfortable in the company of other people. English = shyness.
2. The quality of being nervous and uncomfortable in the company of other people and having no courage or self-confidence. English = timidity.
3. The quality of being nervous and uncomfortable in the company of other people and to be easily embarrassed. English = bashfulness.
As a Verb or Adjective:
1. To be nervous and uncomfortable in the company of other people. English = (be) shy.
2. To be nervous and uncomfortable in the company of other people and to show no courage or self-confidence. English = (be) timid.
3. To be shy and easily embarrassed. English = (be) bashful.