Threw something away or got rid of it because it was no longer wanted or needed.
From 'dis-' (away) and 'card' (from French carte, a card or piece). Originally used in card games to throw down a card; evolved to mean throwing away anything unwanted.
The word started in card games where you 'discard' weak cards—it's interesting how specific game language becomes general vocabulary, like we 'draw' from banks and 'pass' on offers.
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