mobility
[C/U] Both
This term carries a strong connotation of freedom and accessibility. In medical or physical contexts, it suggests a lack of restriction or pain, focusing on the mechanical capacity of a joint or limb to function through its full range of motion. In sociological or professional contexts, it describes the fluidity of a hierarchy. It suggests a dynamic environment where boundaries are permeable, contrasting with a rigid or stagnant social structure where one is trapped in the class they were born into.
Uncountable when discussing the general capacity for movement or the abstract concept of social climbing. Countable when referring to specific types of movement capabilities, such as different levels of mobility in various medical patients.