The affix khaś comes after the verbs ruji 'to break into pieces' and vah 'to carry', when preceded by the upasarga ut and the word kūla 'bank' is in composition with them as the object.,
Thus कूलमुद्रुजति = कूलमुद्रुजः 'breaking down banks' (such as a chariot, river, elephant, &c.); कूलमुद्वहः 'tearing up or carrying away the bank'.,