Firmly or stubbornly attached; immovably fixed or unwilling to change one's mind despite evidence.
Compound of 'blind' (without sight/understanding) and 'fast' (firmly fixed). This archaic term combines the idea of being blind with being stuck in place, suggesting stubborn inflexibility based on prejudice rather than reason.
This is a delightfully obsolete word that perfectly captures the idea of 'stuck in your ways'—not just holding a belief, but being *fastened* to it so completely that nothing can budge you. It's the perfect word for describing someone blindly committed to a failing idea.
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