IPA: /əˈdʌm brəl/
KK: /əˈdʌm brəl/
Relating to or characterized by darkness or shadow; often used to describe something that is dim or obscured.
The adumbral area beneath the trees provided a cool refuge from the summer sun.
Adumbral is formed from "ad-" (meaning to or towards) and "umbra" (meaning shadow). The word describes something that is related to or cast by a shadow.
Think of something that is 'towards' ('ad-') a 'shadow' ('umbra') — that's why adumbral refers to something related to shadows.