1 optimistic

2 sanguine

3 generous

4 magnanimous

5 open-minded

1 to throw caution to the wind

2 to press one's luck

3 to go for broke

1 wide and open

2 a flash of understanding

1 to play Chinese finger-guessing game

1 to exempt

2 exemption

1 suddenly opens up to a wide panorama (idiom); to come to a wide clearing

2 fig. everything becomes clear at once

3 to achieve speedy enlightenment