Trubetzkoyan

== English == === Etymology === From Trubetzkoy +‎ -ian. === Adjective === Trubetzkoyan (comparative more Trubetzkoyan, superlative most Trubetzkoyan) Of or relating to Nikolai Trubetzkoy (Russian: Никола́й Трубецко́й; 1890–1938), Russian linguist and historian, widely considered to be the founder of morphophonology.