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Crossword clue: becoming inflexible or out of date

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

fossilisation 13 letters wn-def

becoming inflexible or out of date

fossilization 13 letters wn-def

becoming inflexible or out of date

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Related clues

Another word for fossilizationThe process of converting, or of being converted, into a fossil.