It's a very common root, appearing in a wide range of words related to life, living things, or vitality.
Here are some examples:
* Vivid (full of life)
* Vital (essential to life)
* Vicious (full of violent life)
* Vivify (to give life to)
* Vicarious (experiencing something through another)
* Survive (to live through)
* Revive (to bring back to life)
* Convi**ct (to prove someone guilty, literally to "convince" them of their life of crime)
Keep in mind that the meaning of "vi" can sometimes be subtle and nuanced, depending on the word it's a part of.