In a manner showing grief, sadness, or despair due to lost love or deep disappointment.
From 'brokenhearted' (adjective meaning having a broken heart from sorrow) + -ly adverbial suffix. Compounds 'broken' + 'heart' + 'ed' + 'ly'.
Unlike most adverbs, 'brokenheartedly' is almost exclusively used in literature and romance—it's one of those words that signals you're reading something emotional and somewhat old-fashioned.
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