Mobileness is a characteristic that describes the ability to move or be moved easily, but what are the antonyms for this concept? One antonym for mobileness is immobility, which describes the state of being unable to move or resistant to motion. Immobile objects can be fixed, stationary, or stuck in one place. Another antonym for mobileness is inflexibility, which is the opposite of flexibility. Inflexibility refers to the inability to bend, stretch, or change easily. When we speak of rigid systems, traditional ways of thinking, or hardline stances, we are describing an absence of mobileness. Overall, the antonyms of mobileness point to the opposite qualities of being still, solid, or inflexible.