fossilise
Verb
Meaning
become mentally inflexible
convert to a fossil
Source: WordNetSynonyms
fossilize
harden
concrete
strengthen
fix
cake
clarify
solidify
stiffen
thicken
ossified
congeal
mineralize
calcify
indurate
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Antonyms
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Examples
The little animals fossilized and are now embedded in the limestone
How to Fossilise Your Hamster.