I need a term or word to refer to something which is very powerful but if used naïvely will cause great harm.

I could say: "This is a [noun], use with care." or: "Use this with care it is [adjective]."

My example would be Fusion, it's powerful... but you better know what you're doing.

  • 1
    Sounds like The Force. – bib Jul 16 '14 at 11:42
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    In a text that thing is simply called "dangerous","to be used with caution", or "to be used with extreme care". If it's one word to put on the physical thing it's usually "danger", "warning", "caution" or "beware of" depending on the situation. You can also draw a triangle with an exclamation mark inside. – P. O. Jul 16 '14 at 11:47
  • What's wrong with powerful, again? – Andrew Leach Jul 16 '14 at 12:54
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    Great question, I believe there is no such single word, surprisingly. Phrases like "Pandora's box" are sometimes relevant. – Fattie Jul 16 '14 at 15:08
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    hazardous is the word often used in this context. – ghoppe Jul 16 '14 at 17:18

What about PANDORA'S BOX?

It's often used in English for this sort of thing -- depending on the exact shade of meaning you want. Hope it helps.


If you want a word to warn of danger of usage, I would recommend dangerous or perilous. From Merriam-Webster online,

Dangerous adj.

involving possible injury, harm, or death : characterized by danger


Perilous adj.

full of danger

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