- Today's Word
Nebulous
[NEB-yuh-lus]
Definition
- (noun) Something that is vague, cloudy, or unclear. It often refers to ideas, concepts, or situations that are hazy, poorly defined, or lacking in distinct form or structure.
Example
The company’s nebulous policy on remote work left employees confused about whether they were allowed to work from home and under what circumstances.
Fun Fact
The word “nebulous” comes from the Latin word “nebula,” meaning “mist” or “cloud.” In astronomy, a nebula is a cloud of gas and dust in space, often visible as a hazy patch of light. The term’s astronomical connection adds depth to its metaphorical use, evoking images of vast, indistinct cosmic clouds to describe unclear or poorly defined concepts in everyday life.
(adjective) Deliberately untrustworthy and deceitful; guilty of betraying trust or breaking faith.
The perfidious advisor had been leaking confidential strategy to competitors for years, all while accepting promotions and praise from the company he was quietly destroying.
Perfidious derives from the Latin perfidiosus, meaning “treacherous,” rooted in perfidia — “faithlessness” — built from per- (“through” or “away”) and fides (“faith” or “trust”). The same root fides gives us fidelity, confide, and fiduciary — making perfidious the dark twin of an entire family of words built on trust and loyalty. It entered English in the 16th century and has carried its sense of calculated, deliberate betrayal ever since.