One who hunches or squats; or in architecture, a reinforcing piece or support used in haunched arches.
Agent noun formed from 'haunch' with the '-er' suffix, meaning 'one who haunches.' Primarily used in architectural contexts to describe a structural element.
Architectural terms are like looking at the vocabulary of problem-solving—'hauncher' is a word that exists because medieval builders literally needed a name for the specific wedge-shaped stone that made their arches stronger.
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