The process of making something dead or removing its vitality, liveliness, or effectiveness.
From the verb 'dead' (to make dead or reduce intensity) plus the gerund suffix '-ing'. 'Dead' as a verb emerged in Middle English from the adjective, used figuratively to mean dulling or extinguishing.
In theater, 'deading' is crucial—sound engineers talk about deading acoustics to prevent echoes, which literally means killing off sound waves that would otherwise bounce around.
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