fossilize

kivettyä

piintyä puhekieltä to make into a fossil
1989, Grant Naylor, Red Dwarf: Infinity Welcomes Careful Drivers

Most of the booths had been scooped clean by the scalpel-sharp corner of the glacier in the crash. Three remained. Two of them were punctured and, inside, the once-human occupants had been fossilized into the walls by centuries upon centuries of patient ice.

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