dyed in the wool
adjective/ˌdaɪd ɪn ðə ˈwʊl/
/ˌdaɪd ɪn ðə ˈwʊl/
[usually before noun] (usually disapproving)- having strong beliefs or opinions that are never going to change
- dyed-in-the-wool traditionalists
Word OriginFrom the idea that wool which was dyed in its raw state gave a more even and lasting colour.
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dyed in the wool