Related Clues:

• Coy
• 'Billy, Don't Be --'
• Introverted
• 'No man is -- to his valet'
• Like shrinking violets
• Skittish
• Hardly gregarious
• Unlikely to raise one's hand in class
• A little short, as of money
• Wallflowery
• 'Don't try to be ___'
• Self-conscious
• Reclusive
• 'Billy, Don't Be (1974 hit) --'
• Not forward