1. (

• diffident ,
• shy ,
• timid ,
• unsure ,

) lacking self-confidence; "stood in the doorway diffident and abashed"; "problems that call for bold not timid responses"; "a very unsure young man" ;

2. (

• shy

) short; "eleven is one shy of a dozen" ;

3. (

• shy

) wary and distrustful; disposed to avoid persons or things; "shy of strangers" ;