1 sky

1 perfect

2 perfection

3 perfectly

1 navigation

1 air

2 atmosphere

1 space

2 room

3 (fig.) scope

4 leeway

5 (astronomy) outer space

6 (physics, math.) space

1 a worthless piece of paper (idiom)

1 the people are gone and the place is empty (idiom)

2 the sight of a deserted place brings old friends to mind

3 the place is deserted

4 the birds have flown

1 (idiom) to safeguard (sth)

2 to protect (sth)

1 inexpensive and of good quality (idiom)

1 to satisfy rival demands (idiom)

2 to get the best of both worlds

3 to have it both ways

4 to have one's cake and eat it too