Related Clues:

• Easily startled
• Unlike a people person
• Dangerous to drive on
• Opposite of 32 Down
• Not at all hospitable
• Withdrawn from people
• Loath to mingle
• Distant - freezing
• Still owing
• Not big on social events, say
• Numbing, in a way
• Polar
• Not the mixing kind
• Less than cordial
• Like perilous winter roads