hydra

noun
1
a snake with several heads. As one head was cut off, another one grew. In the end it was killed by Hercules.
هیدرا, مار چند سر افسانه‌ای
2
a thing that is very difficult to deal with, because it continues for a long time or because it has many different aspects
هیدرا, مسئله پیچیده, مشکل چند بعدی
3
an extremely small water creature with a body that is like a tube in shape and tentacles around its mouth
هیدرا, هیدرای آبی