What is the English word of kankuro?

"Kankuro" doesn't have a direct English translation as it's a Japanese name.

However, if you're asking about the character Kankuro from the anime and manga series Naruto, his name is simply Kankuro.

It's possible you're looking for the meaning of the name. In Japanese, "Kan" means "iron" and "Kuro" means "black." So, the name Kankuro could be interpreted as "Black Iron" or "Iron Black."