Short answer: "goodbye" in English is Goodbye, or Bye depending on the situation.
Goodbye, the core translation
The default way to say "goodbye" in English is Goodbye. Pronounced roughly good-BYE.
When English speakers actually use it
Almost nobody says the full "goodbye" out loud; "Bye" is what you'll hear.
Alternative: Bye
Bye is the other option English speakers reach for in this situation. It's not a synonym so much as a register shift, use the one that matches who you're talking to.
Practice this in a real English conversation
Reading a phrase and saying it out loud are two different skills. Skala's AI conversations let you drop "Goodbye" into a real English exchange in your first 3-minute lesson, so it sticks the first time.
Start learning English today
Skala is free on iOS and Android. One 3-minute English lesson gets you your first 0.1%. Show up daily and the % climbs. That's the whole method.
FAQ
What's the most polite way to say "goodbye" in English?
Both Goodbye and Bye are polite. Pick based on who you're talking to: register, not translation, is what natives are tuning into.
How do I pronounce Goodbye?
Roughly good-BYE. Recording yourself once and comparing to a native audio inside Skala closes the gap faster than reading pronunciation guides.