IPA: /dɪˈluːviən/
KK: /dɪˈluːviən/
Related to a great flood or deluge.
The diluvian landscape was shaped by the massive floods that occurred thousands of years ago.
Diluvian is formed from "diluvius" (meaning of a flood) and the suffix "-an" (meaning pertaining to). The word "diluvian" refers to something that is related to or characteristic of a flood, particularly the biblical flood.
Think of the word 'diluvius' which relates to a flood, and remember that 'diluvian' describes things pertaining to floods.