"fossilized" in the verb sense
1. fossilize, fossilise
convert to a fossil
"The little animals fossilized and are now embedded in the limestone"
2. fossilize, fossilise
become mentally inflexible
"fossilized" in the adjective sense
1. fossilized, fossilised, ossified
set in a rigidly conventional pattern of behavior, habits, or beliefs
"obsolete fossilized ways"
"an ossified bureaucratic system"
Source: WordNet® (An amazing lexical database of English)
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