What is a leech what double meaning does the word leech have?

A leech is a type of segmented worm, often found in freshwater environments, that feeds on the blood of various animals, including humans. The Word "leech" also has a double meaning; it can refer to a person who exploits others for personal gain, particularly in a parasitic manner, similar to how the worm feeds. This figurative use highlights the idea of someone who drains resources or emotional support from others without giving anything in return.