* "vais" (present tense of "aller", meaning "I am going")
* "va" (present tense of "aller" meaning "he/she/it is going")
* "vas" (present tense of "aller" meaning "you are going")
It's important to provide more context to understand what you meant.
For example, if you were asking about a word in a specific phrase, please share the whole sentence.