IPA: //koʊˌɛvəˈluːʃənəri//
KK: /koʊˌɛvəˈluːʃənəri/
Relating to the process where two or more species influence each other's evolution over time.
The coevolutionary relationship between bees and flowers is essential for their mutual survival.
Coevolutionary → It is formed from "co-" (meaning together) and "evolution" (from Latin "evolutio", meaning unrolling or unfolding). The word describes the process of two or more species evolving together in response to each other.
Think of species evolving 'together' ('co-') in a process of 'unfolding' ('evolutio') — that's what coevolutionary means.