n.
1.(Greek mythology) monster with nine heads
2.a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
3.trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality
4.small tubular solitary freshwater hydrozoan polyp
Idiom of the Day
keep at (something)
to persist with something
My cousin has decided to keep at his studies and I am sure that he will succeed.