x1 [ideal] is the conceptual shape/form of object/abstraction/manifestation x2 (object/abstract).
Also pattern; x1 is the mathematical or theoretical ideal form, while x2 is an object/event manifesting that form; e.g. circular/circle-shaped (= cukseltai) vs. circle (=cuktai, while cukla alone is ambiguous); model (= ci'ersaptai, saptai, ci'ersmitai, smitai). See alse nejni, te marji for physical shape, tapla, bliku, kubli, kurfa, cukla, mapti, morna, sarlu.