I generally use ‘count’ for a counter and ‘idx’ for index.
I’m not using C or Java languages though - if I were I would probably go with the more classic terse approach.
Also, if I’m reviewing a PR and I have to load more of the diff context to understand what a variable represents, then that variable has the wrong name.
Imagine depending on your creditor, who also happens to be your employer, for the very oxygen you breathe. This would be like a company town x1000.