Formal:
* Ọ̀rẹ́ mi tí ó dájú: This literally translates to "my true friend" and is a good option for a close friend you've known for a long time.
* Ọ̀rẹ́ mi tí ó gbọ́n: This means "my wise friend" and is a good choice if you value your friend's intellect and advice.
Informal:
* Ọ̀rẹ́ mi tó dájú: A more casual version of the formal phrase.
* Ọ̀rẹ́ mi tí mo nífẹ̀ẹ́ sí: This translates to "my friend whom I love" and is more affectionate.
* Ọ̀rẹ́ mi tó jẹ́ ẹni tí mo gbẹ́kẹ̀lé: This means "my friend that I trust" and emphasizes the reliability of your friend.
You can also use a combination of these phrases to express the specific meaning you want. For example, you could say "Ọ̀rẹ́ mi tí ó dájú tí mo nífẹ̀ẹ́ sí" to convey "my true friend whom I love."
Ultimately, the best way to say "best friend" in Yoruba is to use the phrase that feels most natural and authentic to you and your relationship with your friend.