inextensible

Consider an inextensible osmotic cell containing a solution of sugar, the walls of the cell being impermeable to sugar but permeable to salt.

Consciousness, wherever it exists, is single, indivisible, inextensible; and other consciousnesses, and the whole external universe, are, to the individual percipient, but shapes in a more or less protracted dream.

Antonyms: inextensible, rigid, inelastic. extension, n. enlargement, expansion, protraction; projection.

While ligaments are pliable and flexible, permitting free movement, they are also wonderfully strong and inextensible.

Since the walls of the cell are inextensible, the quantity of water in the cell cannot increase.