To free or disburden someone from something heavy, cumbersome, or troublesome.
From 'dis-' (away, removal) and 'cumber' (to burden or hamper, from Old French 'combrer'). The prefix suggests removing or taking away the burden that 'cumber' refers to.
Shakespeare and his contemporaries used 'discumber' in poetry to mean 'unburden' or 'lighten the load,' but today we'd just say 'get rid of' or 'rid yourself of.' It's a genuinely useful word that disappeared from English for no good reason.
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