iirc, wax means "to get more", while wane is "to get less".
the phase of the moon is usually referred to by these words.
the problem is that in the northern hemisphere (where most humans live, sorry you three ) when the moon is waxing (new) it looks like this )
its easy to remember, when it's born it looks like the bottom part of a 'b', and when it's dieing it looks like the bottom part of a 'd'.
i suggest muddying the water further and defining ( = wane, ) = wax
so that "wax bang at hash buck grapes circumflex and splat wane" is )!@$%^*(