IPA: /dɪˈstrʌktɪvli/
KK: /dɪˈstrʌktɪvli/
In a way that causes damage or destruction.
The storm destructively altered the landscape, leaving behind fallen trees and debris.
Destructively → It is formed from "de-" (meaning down or away) and "struere" (meaning to build) combined with the suffix "-ive" (meaning having the nature of) and the adverbial suffix "-ly". The word describes an action that has the nature of tearing down or causing damage.
Think of 'down' ('de-') and 'building' ('struere') to remember that 'destructively' means having the nature of tearing things down.