party – la fiesta

(Pronounced fee-ehs-tah)

To remember that party is pronounced fee-ehs-tah (fiesta) in Spanish, use the following mnemonic:

The party is expensive to get into. The fee is estimated to be a (fiesta) weeks salary for me. 

Fiesta is feminine, so it's  la fiesta. Imagine a ladies-only party that gets out of hand.