The way we conceptualize something—as one thing or many things—doesn’t always match up with the way our word for it behaves. There are some nouns that only have a plural form, regardless of how we think of them. They are known as pluralia tantum, Latin for “plural only.”
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8. SHENANIGANS
Words for activities that might be individually very different in their specifics but similar in some general aspect will sometimes be pluralia tantum. You may indulge in shenanigans, heroics, or hysterics, or sometimes all three.
via Mental Floss
September 13, 2013
