ISEE/SSAT Vocabulary Builder›Words›M›mercurial
ISEE/SSAThard
mercurial
changing mood or behavior suddenly and unpredictably
Synonyms
Antonyms
- stable
- constant
- predictable
mercurial in a sentence
The mercurial coach shifted from praise to anger without warning.
Because the director was mercurial, rehearsals could be warm one day and bitter the next.
Where it comes from
From Latin Mercurius, the swift and changeable Roman god Mercury.
Memory hook
MERCURY moves quickly; a mercurial mood changes just as fast.
Read it in context
- Against the Metal Arts