A hydra is a tiny animal that lives in fresh water like ponds. It has many arms called tentacles. If an arm is cut, it can grow back again.
The hydra lives in clean water ponds.
A hydra can grow new arms easily.
Hydra is the name of a group of stars seen in the sky. It looks like a long water snake made of stars.
Hydra is a large constellation in the night sky.
We saw the stars of Hydra last night.
In stories from ancient Greece, the hydra is a monster with many heads. When one head is cut off, two more grow back instead.
The hero fought the fierce hydra.
The hydra had many heads to cut.
People sometimes call a difficult problem a hydra because when you fix one part, more problems appear. It is like the myth where heads grow back.
The budget cuts created a hydra of problems.
Fixing this issue is like fighting a hydra.
HYDRA is the name of a secret bad group in stories like comics or movies. They try to do harmful things in secret.
HYDRA plans to control the world in the movie.
Heroes fight against HYDRA agents.
In science, Hydra is a group name for small fresh water animals that can regrow parts. They belong to a large family of animals with stinging cells.
Hydra is studied for its regeneration in biology.
The genus Hydra has no brain or heart.
In some sci-fi stories, a hydra is a large robot or machine with many parts or weapons. It’s named after the mythical creature because it has many 'arms' or 'heads'.
The hydra robot had many arms with guns.
In the story, the hydra attacks the city.
