Fossilization of 主(しゅ) (shu) + たる (taru, prenominal of the archaic copular たり (tari)). (Tokyo) しゅたる [shúꜜ tàrù] (Atamadaka – [1]) (Tokyo) しゅたる [shù táꜜrù]...
Examples この (kono, “this”) 所謂 (iwayuru, “so-called”) <span class="searchmatch">主たる</span> (shu-taru, “main”) 単なる (tan-naru, “mere”)...