κωλύω to let, hinder, check, prevent: c. acc. et inf. to hinder or prevent one from doing, Hdt., Soph., etc.; with a negative added, κ. τινὰ μὴ θανεῖν Eur., etc.:—Pass. to be hindered, τοῦ ὕδατος πιεῖν from drinking of the water, Plat.; κωλυόμεσθα μὴ μαθεῖν Eur.; rarely with part., μὴ κωλύωνται περαιούμενοι Thuc. c. gen. rei, κ. τινά τινος to let or hinder one from a thing, Xen.; so, κ. τινα ἀπό τινος Xen. c. acc. rei, to hinder, prevent, impede, Eur., Thuc.:—Pass., μηδὲ δαπάνηι κεκωλύσθω and let there be no hindrance by reason of expense, Thuc. absol., ὁ κωλύσων one to hinder, Soph.; τὸ κωλῦον a hindrance, Xen. often in 3 pers., οὐδὲν κωλύει there is nothing to hinder, c. acc. et inf., Hdt., Ar.:— οὐδὲν κωλύει, absol., as a form of assent, nothing hinders, be it so, Ar.