IPA: /ˈærɪs/
KK: /ˈærɪs/
A sharp edge or ridge that is created where two surfaces meet at an angle, often seen in moldings.
The carpenter carefully shaped the arris to ensure a smooth finish on the corner of the cabinet.
The word 'arris' originates from Old French 'arête', meaning a sharp edge or ridge. It refers specifically to the sharp edge formed by the intersection of two surfaces, particularly in architecture and carpentry.
Think of a sharp 'edge' ('arête') where two surfaces meet — that's what 'arris' refers to.