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noun Uncommon

hydra

HYD-ruh

Hydra (noun) means a many-headed serpent from Greek mythology that grew two new heads whenever one was cut off. Example: “Hercules had to burn each stump to stop the hydra from regrowing its heads.”

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noun
1
A many-headed serpent from Greek mythology that grew two new heads whenever one was cut off.
"Hercules had to burn each stump to stop the hydra from regrowing its heads."
2
A tiny freshwater animal with a tube-shaped body and tentacles around its mouth, related to jellyfish.
"Under the microscope, the hydra's tentacles waved slowly in the water."
3
A problem so tangled and persistent that solving one part of it just causes another part to appear.
"Corruption in the city turned out to be a hydra — every scandal they shut down led to two more."

How to use hydra

Learner’s notes

In plain EnglishEither the mythical many-headed monster, a microscopic pond animal, or (figuratively) a problem that keeps growing back no matter how you attack it.

Common pairings
a hydra of a problem many-headed hydra
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Word forms

hydras plural, hydrae plural, hydræ plural

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Hercules had to burn each stump to stop the _____ from regrowing its heads.

Etymology

Named after the Hydra of Greek mythology, the multi-headed monster slain by Hercules; the tiny pond creature was named for its ability to regenerate in a similar way, and the figurative sense of an unstoppable, ever-multiplying problem comes from the same myth.

Origin: Greek

Related words

Frequently asked questions

What does “hydra” mean?

The word “hydra” means a many-headed serpent from Greek mythology that grew two new heads whenever one was cut off. In plain terms, either the mythical many-headed monster, a microscopic pond animal, or (figuratively) a problem that keeps growing back no matter how you attack it.

How do you pronounce “hydra”?

“Hydra” is pronounced HYD-ruh (/ˈhaɪdɹə/ in IPA).

How do you use “hydra” in a sentence?

Here is “hydra” used in a sentence: “Hercules had to burn each stump to stop the hydra from regrowing its heads.”

What part of speech is “hydra”?

“Hydra” is a noun.

Where does the word “hydra” come from?

The word “hydra” comes from Greek.

Is “hydra” a common word?

“Hydra” is an uncommon word in modern English.

How many meanings does “hydra” have?

“Hydra” has 3 distinct senses listed in this dictionary. The most common is: a many-headed serpent from Greek mythology that grew two new heads whenever one was cut off.

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Definitions: FreeDict original editorial