deteriorationn.
英 dɪ,tɪərɪə'reɪʃn | 美 dɪ,tɪrɪə'reʃən
中文n. 恶化；退化；堕落
词根词源
deterioration (n.)1650s, possibly a native formation, or else from French détérioration (15c.), noun of action from détériorer, from Late Latin deteriorare (see deteriorate).
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