IPA: //ˌædʌmˈbreɪʃən//
KK: /ædʌmˈbreɪʃən/
A faint or unclear representation of something, often showing only the basic outline or shape without much detail.
The artist's adumbration of the landscape captured its essence without detailing every element.
Adumbration is formed from "ad-" (meaning to) and "umbra" (meaning shadow). The term refers to the act of giving a faint indication or a shadowy outline of something, thus suggesting or foreshadowing it.
Think of 'shadow' ('umbra') as a way to remember that 'adumbration' means to give a faint outline or indication of something.