Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word subdiale could not be parsed. Trying a normal dictionary lookup:
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sub-dĭālis (subdīvālis, Amm. 19, 11, 4), e, adj. [dius], that is in the open air (post-Aug.): inambulationes, Plin. 14, 1, 3, § 11: petrae, id. 34, 12, 29, § 117.
As subst.: subdĭālĭa, ĭum, n., open galleries or terraces; a transl. of the Gr. ὑπαίθρια, ὕπαιθρα, Plin. 36, 25, 62, § 186.
Also in sing.: subdival domus, Tert. adv. Jud. 11.