IPA: //ˈmuːnbiːm//
KK: /ˈmunˌbim/
A ray of light that comes from the moon.
The moonbeam illuminated the dark forest, creating a magical atmosphere.
Moonbeam → The word is formed from "moon" (from Old English *mōna*, meaning the natural satellite of Earth) and "beam" (from Old English *bēam*, meaning a ray or beam of light). Together, they describe a ray of light that comes from the moon.
Imagine a ray of light shining down from the moon — that's what a moonbeam is, combining the moon's light with the idea of a beam.
No commonly confused words.