cera
/ˈθeɾa/ · B2 · noun · f
wax
🕯️🖍️ cera sounds like 'sera' in 'sérum'... think: CERA = CERtain Rich Alloy of wax
Spanish cera comes from Latin cera, wax. Same root as English cerate and ceroplastic, and related to Italian cera. Candles and crayons are both made from wax, which is exactly what cera covers.