pencil – el lápiz
(Pronounced lah-pees)
To remember that pencil is pronounced lah-pees (lápiz) in Latin American Spanish, use the following mnemonic:
Using a pencil, she sketched the last piece (lápiz) of cake.

Lápiz is masculine, so it's el lápiz. Imagine an elephant using a pencil.

Examples of lápiz (pencil) in a sentence
Tengo un lápiz rojo en mi mochila.
(I have a red pencil in my backpack.)
¿Me puedes prestar tu lápiz?
(Can you lend me your pencil?)
El niño dibujó un árbol con su lápiz.
(The boy drew a tree with his pencil.)