IPA: /ˈdɛdənɪŋli/
KK: /ˈdɛdənɪŋli/
In a way that makes something less lively or less interesting.
The lecture was delivered deadeningly, causing many students to lose focus.
Deadeningly → It is formed from "dead" (from Old English "dead", meaning no longer alive) and "-ening" (a suffix indicating a process or action) combined with "-ly" (a suffix that turns an adjective into an adverb). The word "deadeningly" means in a manner that causes something to become dead or lifeless, often referring to dullness or lack of vitality.
Think of something that makes things 'lifeless' ('dead') and the process of making it so ('-ening'), then how it is done in a manner ('-ly'). This helps you remember that 'deadeningly' describes an action that dulls or takes away life.