hardaxis
The term "hardaxis" is not a recognized technical term in fields such as mathematics, physics, engineering, or computer science. It is possible it is a colloquialism, a term specific to a niche community, or a misspelling of a related concept. Without further context, it is difficult to provide a definitive explanation.
In the realm of mathematics, axes are fundamental concepts. For instance, in a Cartesian coordinate system,
If "hardaxis" refers to a specific hardware component or a piece of software, it would likely be