timid
adjective(tim-id)
lacking conviction or boldness or courage
timid
adjective(tim-id)
lacking self-confidence
Examples:
Problems that call for bold not timid responses. 
timid
noun(tim-id)
people who are fearful and cautious
Examples:
Whitewater rafting is not for the timid. 
timid
adjective(tim-id)
showing fear and lack of confidence