IPA: /ˈblæntʃər/
KK: /ˈblæntʃər/
A person or thing that makes something white or lighter in color, often by removing color or impurities.
The blancher is used in the kitchen to prepare vegetables by briefly boiling them and then cooling them quickly.
Blancher is derived from the Old French word 'blanchir' (meaning to whiten) and the suffix '-er' (meaning one who). Thus, a blancher is one who whitens or bleaches something.
Think of someone who 'whitens' ('blanchir') something — that's what a blancher does.