If someone is dyed-in-the-wool, or has dyed-in-the-wool opinions, they hold those opinions strongly and will not change them.固執己見的,頑固的
He's a dyed-in-the-wool traditionalist where cooking is concerned - he doesn't allow any modern gadgets in the kitchen.在烹飪方面他是個徹頭徹尾的傳統主義者——他不使用任何現代廚房炊具。