What is another word for intrados?
Pronunciation: [ˈɪntɹədˌə͡ʊz] (IPA) 
Intrados, meaning the lower interior surface or curve of an arch or vault, can be rephrased in various ways. One common synonym for intrados is "underside," which refers to the interior surface of the structure. Another synonym that can be used for intrados is "soffit," which refers to the visible undersurface of an arch or overhanging structure like a balcony or porch. Other similar words include "inner curve," "inverted curve," and "concave surface." Each of these words can be used alternately and interchangeably with intrados, depending on the context and purpose of the sentence.
