Final answer:
The Tagalog word 'magastos' translates to 'expensive' or 'costly' in English, typically used to describe items or activities that require a significant amount of money.
Step-by-step explanation:
The English translation for the Tagalog word magastos is expensive or costly. This term is often used to describe something that requires a lot of money to purchase or maintain. An example would be a luxury car that is expensive to buy and maintain due to its high cost of parts and service.