phantom
UK: ˈfæntəm | US: ˈfæntəm
n. 1. A ghost or apparition; an illusory image.
n. 2. Something elusive or unreal.
adj. 1. Illusory; not physically existing.
The word "phantom" traces back to Greek phantasma ("apparition, illusion"), derived from phantazein ("to make visible"). The root phant- relates to light or visibility (seen in "fantasy" and "phenomenon"). The suffix -om (via Latin -ma) nominalizes the concept, solidifying its meaning as "an object of perception." Over time, "phantom" evolved from describing visible illusions to encompassing elusive or intangible entities.
The old castle was rumored to be haunted by a phantom.
She chased the phantom of perfection but never attained it.
The radar detected a phantom aircraft that vanished moments later.
His wealth was a phantom, built on debts and empty promises.
The scientist studied phantom limb pain in amputees.