wax — as in: the moon is waxing
The moon is waxing. It will be full tomorrow.
a gradual increase (in size or strength or power or number) — especially the part of the moon that is visible
More commonly, wax is used to refer to a soft substance that melts when warmed and is seen in candles, crayons, beehives, polishes, and even the human ear. The word can also be used as a verb to refer to rubbing a coat of wax onto something such as a car or floor or furniture to protect it from water and/or improve appearance. Wax put on a surfboard also provides less slippery footing than the fiberglass board.
Wax can also be used as a verb to refer to the process of removing hair from the body by applying warm wax to the area being treated and pulling it off after it has cooled around the hair, so that the hair is pulled out from the root.
Less commonly, wax can refer to a stated manner of speech or writing; e.g., "She waxed eloquent," means that she talked in an eloquent manner. "She waxed on," means that talked more or for a longer time.