"To wax and wane" is literally "croître et décroître," but it could also be translated many other ways, depending on the context. Here are just a few other possibilities: grandir, pour ensuite diminuer; changer; évoluer; fluctuer. "Wax and wane" can also be a nominal phrase. Example: the wax and wane of power => les fluctuations du pouvoir.
wax and wane -> croître et décroître
The opposite of to wax is to wane. Wax means to grow and wane means to diminish
le cire
wax and wane
xx
wax
rise set wax wane
During the time at sea, the sailors saw the moon wax and wane three times.
the earth blocks it from the sun
That completely depends on when you start watching it. The question is like asking: "Does it get light or dark outside first ?"
Two weeks, and two weeks to wane.
The revolving of the earth and the rotating of the moon.
Wax and wane