1. Bless: This is the most common way to say bye in Icelandic. It is pronounced "bless" and is similar to the English word "bless you."
2. Góða nótt: This means "good night" and is used when you are leaving someone for the night.
3. Sjáumst síðar: This means "see you later" and is used when you expect to see someone again soon.
4. Far vel: This means "farewell" and is used when you are saying goodbye to someone for a long time or indefinitely.