IPA: /ˌpoʊstəˈrʌptɪv/
KK: /pəʊstəˈrʌptɪv/
Relating to the period or events that occur after a volcanic eruption.
The landscape was dramatically altered during the posteruptive phase of the volcano's activity.
Posteruptive → It is formed from "post-" (meaning after) and "eruptive" (from Latin "eruptio", meaning a breaking out). The word refers to events or phenomena that occur after an eruption, particularly in a geological context.
Think of something happening 'after' ('post-') a 'breaking out' ('eruptive') — that's what posteruptive means.