: Changeability, variability, inconstancy, fluidity, or instability.
: The tendency to change frequently or be inconstant. mutableness
: Immutability, stability, permanence, or constancy. Contextual Applications mutableness
The concept of mutableness appears in various specialized fields, each highlighting a different facet of change: Borrowed pointers | Rust for C++ Programmers - aminb mutableness