fossilized

• fossilised (UK)

fossilized

1. simple past and past participle of fossilize

fossilized

1. In a state of fossilization; preserved in rock
2. outmoded
3. (linguistics) having become a fossil: no longer productive

   A fossil word in a language is a word which has fallen out of use except for in set phrases: e.g. the English word fro, used only in to and fro. A fossilized bound morpheme (e.g. a fossilized affix) is one which was once able to derive words, but which now only exists as a fixed component of words: e.g. the English abstract noun–forming suffix -th.

• (outmoded): antiquated, disused, outdated; see also Thesaurus:obsolete or Thesaurus:unfashionable