Hesychius sigma2734 glosses with sune/nteucis, a compound otherwise unknown in Greek. Photius' Lexicon (sigma819 Theodoridis) has, instead of this feminine headword, neuter suntu/xhma (glossed with the feminine). See also sigma 1638, sigma 1639, sigma 1648, epsilon 1495, tau 1232 (cf. tau 1233 and tau 1234).
[1] Unidentified.
[2] Damascius, Life of Isidore fr. 192 Zintzen. For the distinction between e(/cis ('deeply rooted disposition') and dia/qesis ('changeable attitude') see John of Damascus cited at epsilon 1767. The phrase kata\ suntuxi/an has become widespread for 'accidentally, by accident' (cf. kappa 688), and should perhaps be so understood here.