κατιόομαι

A. become rusty, tarnished, LXX Si. 12.11 (Act. is v.l.), Str. 16.2.42, Ep.Jac. 5.3, Dsc. 4.82, Arr. Epict. 4.6.14: metaph., βασιλεία σιδηρᾶ καὶ ‐ιωμένη D.C. 71.36.