Fossilize /(?)/

imp. & p. p. Fossilized; p. pr. & vb. n. Fossilizing

1. To convert into a fossil; to petrify; as, to fossilize bones or wood.
2. To cause to become antiquated, rigid, or fixed, as by fossilization; to mummify; to deaden.

   Ten layers of birthdays on a woman's head Are apt to fossilize her girlish mirth.

1. To become fossil.
2. To become antiquated, rigid, or fixed, beyond the influence of change or progress.