It appears in words like:
* Umbrage: Offense or resentment, which is a figurative shadow of disapproval.
* Umbrella: A device that provides shade, literally a "little shadow."
* Umbra: The darkest part of a shadow, often used in astronomy to describe the darkest part of a shadow cast by a celestial body.
The root "umbr-" is a good example of how Latin roots can help us understand the meanings of English words, even if those words seem quite different from their Latin origins.