dyed in the wool

unchanging in a particular belief or opinion; inveterate

彻头彻尾的，十足的；根深蒂固的

she's a true blue dyed-in-the-wool Conservative.

她是个彻头彻尾的保守党分子。

of the deepest dye

Of the most extreme sort.

极端的：属最极端类型的