IPA: /ˈdɛfənɪŋ/
KK: /ˈdɛfənɪŋ/
Extremely loud or overwhelming in sound, often to the point of being uncomfortable or hard to ignore.
The concert was so deafening that I had to cover my ears.
Deafening → It is formed from "deafen" (from Old English "deafian", meaning to make deaf) and the suffix "-ing" (indicating the action or result of). The word "deafening" refers to the action of making someone unable to hear, often due to an overwhelming noise.
Think of the action of making someone 'unable to hear' — 'deafen' means to make deaf, and '-ing' indicates that this is happening right now.