Here's why and some possible translations:
* "Ukungu" is the most common word for "fog" in Swahili, which is similar to mist but denser and more visible.
* "Mavu" refers to a thin layer of moisture, often seen in the morning. This is closer to the concept of "mist" but it's not a perfect translation.
* "Maji ya anga" literally means "water of the sky" and can be used to describe any form of precipitation, including mist.
Ultimately, the best Swahili translation for "mist" depends on the specific context and the level of density you're referring to. You might need to use a descriptive phrase, such as "ukungu mwembamba" (thin fog) or "mavu ya asubuhi" (morning mist).