IPA: /ˈbliːdə/
KK: /ˈblidər/
A person or thing that bleeds, often used to refer to someone who has a medical condition that causes excessive bleeding or to a blood vessel that is bleeding.
The doctor quickly attended to the bleeder to stop the blood loss.
Bleeder → It is formed from "bleed" (from Old English "blēdan", meaning to lose blood) and the suffix "-er" (meaning a person who). A bleeder is a person or thing that bleeds or causes bleeding.
Think of someone who 'loses blood' ('bleed') — the '-er' indicates a person. A bleeder is someone who bleeds.