Fos·sil·ize v. t. [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.   --Mrs. Browning.