Summary
The word comes from the fast‑moving metal called Mercury, which moves fast.
Key Points
3 points1
Mercurial describes rapid and unpredictable changes.
2
It is named after the element Mercury because of its quick flow.
3
Someone who is mercurial may be lively but also hard to predict.
New Words to Learn
3 wordsmercurial
changing quickly and unpredictably
element
a basic kind of material that cannot be broken down further
unpredictably
hard to guess what will happen next
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