fossilize

fos·sil·ize  (fs-lz)

v. fos·sil·ized, fos·sil·iz·ing, fos·sil·iz·es

v.tr.

1. To convert into a fossil.

2. To make outmoded or inflexible with time; antiquate.

v.intr.

To become a fossil.

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fossil·i·zation (-s-l-zshn) n.

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fossilize or -ise

Verb

[-izing, -ized] or -ising, -ised

1. to convert or be converted into a fossil

2. to become out-of-date or inflexible: fossilized political attitudes

Thesaurus

Verb	1.	fossilize - convert to a fossil; "The little animals fossilized and are now embedded in the limestone" fossilise convert - change the nature, purpose, or function of something; "convert lead into gold"; "convert hotels into jails"; "convert slaves to laborers" lapidify, petrify - change into stone; "the wood petrified with time"
	2.	fossilize - become mentally inflexible fossilise senesce, age, maturate, mature, get on - grow old or older; "She aged gracefully"; "we age every day--what a depressing thought!"; "Young men senesce"