Mercurial: meaning, definitions and examples

Use this word when you want to describe someone who changes moods quickly and unpredictably, often used in more formal or literary contexts.

• John's mercurial nature makes him both fascinating and exhausting to be around

This word is often used to describe something or someone prone to sudden and extreme changes, especially in emotions or market conditions. It can also imply a risk of potential danger.

• The political situation in the country is highly volatile, causing widespread uncertainty among its citizens

This word is suitable when describing someone who makes sudden changes in behavior or decisions, often based on whim or fancy rather than reason.

• Her capricious decisions at work often leave her colleagues confused about her true intentions

Use this word when describing someone who is not loyal or constant, especially in relationships or opinions. It may carry a slightly negative connotation.

• The fickle nature of fans in the entertainment industry means today's star can be tomorrow's forgotten name

This word is best used when you want to describe something or someone that cannot be anticipated or expected. It is commonly used in both formal and informal contexts.

• The weather in this region is so unpredictable; you never know if it will rain or shine

Applies to aspects related to or characteristic of the Roman god Mercury, known for his speed and mobility.

• His mercurial wit was unmatched, always quick and sharp

Related to the planet Mercury, often used in astronomical or scientific discussions.

• The mercurian landscape is harsh and barren
• Scientists study Mercurian weather patterns to better understand the planet's atmosphere

Refers to compounds containing the element mercury, typically in a chemical or industrial context. Often carries a negative connotation due to mercury's toxicity.

• Mercuric chloride is a toxic compound used in some industrial processes
• Exposure to mercuric compounds can lead to serious health issues

Similar to 'mercuric,' this term is used in chemistry to describe a specific oxidation state of mercury, typically in its less common +1 valence state.

• Mercurous oxide is less stable than its mercuric counterpart
• Mercurous chloride was historically used in medicine, despite its toxicity