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fossilize

fossilize verb
also British fossilise /ˈfɑːsəˌlaɪz/
fossilizes; fossilized; fossilizing
fossilize
verb
also British fossilise /ˈfɑːsəˌlaɪz/
fossilizes; fossilized; fossilizing
Britannica Dictionary definition of FOSSILIZE
: to become a fossil or to cause (something) to become a fossil
[no object]
[+ object]

— fossilization

also British fossilisation /ˌfɑːsələˈzeɪʃən/ Brit /ˌfɒsəˌlaɪˈzeɪʃən/ noun [noncount]