Related Clues:
- Fearful - shy
- Faint-hearted
- Still owing
- Not big on social events, say
- Like a mouse
- Not likely to pipe up
- Unlikely to make the first move
- Uneffusive
- Faint of heart
- Chickenhearted
- Embarrassed at call for silence at journey's end
- Just short of retiring
- Not at all forward
- Shunning the spotlight, maybe
- Lacking the required funds