In a dashed or broken manner; in a way showing disappointment, defeat, or sudden change of direction (archaic or rare usage).
From 'dashed' (past participle of dash, implying sudden action or impact) + -ly (adverb suffix). This formation is rare and appears mostly in 19th-century literature.
Most adverbs formed from 'dash' didn't survive—we rarely say 'dashedly' anymore, but in Victorian novels you find it to describe someone acting with disappointed energy or thwarted purpose, which is a very specific emotion that's hard to capture in modern English.
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