MERCURIAL

MERCURIAL

<Mer-cure-re-al>

Fickle; volatile; moody;

Moody and unpredictable

The mercurial girl liked chocolate one day and vanilla the next.

MERCUR - IAL

Mercur

(Reminds)

Mercury

A thermometer changes a lot because it has mercury.

MERCURY IAL

You probably use a lexicon every day. What is it?

Answer below...

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Answer: 

A dictionary. Each time you spell check, you're using a lexicon.

 (c) 2014 E. Carruthers