That part of the month between new moon and full moon. In this
period the illuminated area of the moon which we see, is growing.
The verb "to wax" is an old word meaning "to grow", as in German
"wachsen" = "to grow".
The period of the lunar cycle (month) when the view of the moon
goes from new to full. The word is related to the German word
"wachsen" = "to grow". The second half of the cycle is the Waning