Related Clues:

• Troglodyte
• Like shrinking violets
• Nonsocial type
• Skittish
• Hardly gregarious
• Aloof one
• Unlikely to raise one's hand in class
• A little short, as of money
• Solitary soul
• Wallflowery
• Isolationist
• Self-conscious
• Reclusive
• Hardly an extrovert
• Not forward