The Collaborative International Dictionary
Fossilizing
Fossilize \Fos"sil*ize\, v. t. [imp. & p. p. Fossilized; p. pr. & vb. n. Fossilizing.] [Cf. F. fossiliser.]
To convert into a fossil; to petrify; as, to fossilize bones or wood.
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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.
Wiktionary
fossilizing
vb. (present participle of fossilize English)