To deprive of castle status or fortifications; to destroy or dismantle a castle.
From 'dis-' (remove, reverse) and 'castle'. This is an extremely rare word from medieval English, referring to the dismantling of fortifications.
Medieval rulers would sometimes 'discastle' strongholds of rebellious nobles as punishment—it's a feudal verb for a political act that shaped European history but vanished when castles stopped being important.
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