This is the 6485th most frequent Spanish word.
cera
Wax.
Here, 'cera' refers to wax, and its usage is in a literal, material sense.
La vela está hecha de cera.
The candle is made of wax.
In this case, 'cera' denotes car wax serving a protective purpose.
Aplicaremos cera al automóvil para proteger la pintura.
We will apply wax to the car to protect the paint.
Here, 'cera' refers to styling wax for hair, indicating a cosmetic application.