To remove from a case or covering; to uncase or open something enclosed.
From 'dis-' (reverse, remove) and 'case' (container, covering). This is a straightforward verb formation with roots in Middle English, though rarely used in modern English.
Like many 'dis-' verbs, 'discase' is perfectly logical but almost nobody uses it—we say 'uncase' or 'open' instead, showing how English prefers some prefixes over others even when both work.
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