IPA: /ˈstæntʃər/
KK: /ˈstænʧər/
A person or thing that stops the flow of something, especially blood.
The doctor used a stancher to control the bleeding during the surgery.
Stancher is derived from the verb 'stanch' (from Old French *estanchier*, meaning to stop or stem the flow of something) combined with the suffix '-er' (meaning a person who). A stancher is a person or thing that stops or controls the flow of something, particularly in the context of liquids.
Think of someone who 'stops' ('stanch') the flow of something, and the '-er' indicates that this person is doing the action. A stancher is someone who stops the flow.