antediluvian
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/ˌæntidɪˈluːviən/
🇬🇧
/ˌæntidɪˈluːviən/
extremely old-fashioned or outdated
The professor's antediluvian teaching methods were outdated and ineffective.
這位教授的陳舊教學方法已經過時且效果不佳。