Formal:
* Rafiki: This is the most common and direct translation, meaning "friend." It can be used in a formal or informal setting.
* Marafiki: This means "friends" (plural).
* Mwenye upendo: This literally means "one who has love" and conveys a sense of kindness and warmth. It is more formal than "rafiki" but still friendly.
Informal:
* Mchangamfu: This means "cheerful" or "lively" and can be used to describe someone who is approachable and friendly.
* Mpole: This means "gentle" or "kind" and can be used to describe someone who is friendly and easy to talk to.
* Mwenye hisia njema: This literally means "one who has good feelings" and can be used to describe someone who is optimistic and friendly.
The best translation will depend on the specific context and the feeling you want to convey.