Possible interpretations:
* "Guardia" in Italian means "guard" or "watchman."
* "Motto" in Italian means "motto" or "slogan."
Considering these meanings, "Guardia di motto" could be interpreted as:
* A guard who protects a motto or slogan. This could be a literal interpretation, like a guard protecting a sign with a motto on it.
* A guard who has a motto. This could be a metaphorical interpretation, like a guard who is known for their strictness or integrity, and their motto represents their character.
However, without further context, it is difficult to determine the exact meaning of "Guardia di motto."
If you have any further information about where you encountered this phrase, please provide it so I can give you a more accurate answer.