___________ is the largest negative integer. 

All negative integers are less than 0. For example, -3, -2, -1, etc.

-1 denotes 1 less than 0 and -2 denotes 2 less than 0 which means -2 will have a lesser value than -1. Similarly, all other negative numbers will have a value less than -1. Therefore, we can say that -1 is the largest negative number.

Remember that 0 is neither a negative nor a positive integer. Therefore, it can't be the largest negative number.