Mine include 'tantrum', 'jejune', 'elegant', 'audacity', and 'ilk', at least in English.
Not being a native English speaker, I was introduced to many new words through fiction such as comic books, television shows, and movies.
I think I first encountered 'tantrum' in Transformers, where it's the name of a Decepticon. I looked up its meaning, and I liked the sound of it.
'Jejune' is one of those words you rarely see, and I like using it.
'Elegant' is just a pretty word for a pretty concept.
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clarity of thought before rashness of action