dyed in the wool
堅定不移的，根深蒂固的
書面/口語·形容堅定不移
英文釋義
firm or steadfast in one's beliefs or opinions, especially when it comes to a particular topic or ideology
例句
He's a dyed-in-the-wool conservative who never changes his political views.
典故來源
源自羊毛染色工藝，未紡前染色更持久，比喻信念或習慣根深蒂固、難以改變。