pen – el bolígrafo
(Pronounced boh-lee-grah-foh)
To remember that pen is pronounced boh-lee-grah-foh (bolígrafo) in European Spanish, use the following mnemonic:
The pen caused the boat to leak so I grabbed the phone (bolígrafo) to call for help.

Bolígrafo is masculine, so it's el bolígrafo. Imagine an elephant writing with a pen.

Examples of bolígrafo (pen) in a sentence
¿Me puedes prestar tu bolígrafo?
(Can you lend me your pen?)
No encuentro mi bolígrafo en la mochila.
(I can't find my pen in the backpack.)
Necesito un bolígrafo para firmar el documento.
(I need a pen to sign the document.)