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retractability [retractabilities]▼noun[UK: rɪˌtræktəˈbɪlɪti ] [US: riˌtræktəˈbɪlɪti ]
reversibility [reversibilities]▼noun[UK: rɪ.ˌvɜː.sə.ˈbɪ.lɪ.ti] [US: rɪ.ˌvɝː.sə.ˈbɪ.lɪ.ti]
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