Fossilised error

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A fossilised error or fossilized error (/fɒsɪlaɪzd erə/) is an error made by learners where incorrect language becomes a habit and cannot easily be corrected.[1]

Fossilised errors have to be unlearnt.

The process that leads to fossilised errors is called fossilisation.


  1. How To Teach English “Fossilized errors in TEFL”. ICALTEFL.