noun
will-o'-the-wisp; ignis fatuus
A mysterious, floating flame often seen in folklore, typically in wetlands or graveyards. Sometimes associated with spirits or supernatural phenomena.
夜の墓地で鬼火を見たという話を聞いた。
I heard a story about seeing a will-o'-the-wisp in a graveyard at night.
鬼火は科学的には自然発火現象と
Will-o'-the-wisps are sometimes scientifically explained as spontaneous combustion phenomena.