Apte Sanskrit-English Dictionary
a. Very cruel. raḥ [prā. sa.] 1 A malignant planet such as Saturn, Mars &c. (krūrā vakrā atikrūrāḥ).
2 N. of a Mantra in Tantras (triṃśa- dakṣarako maṃtrastrayastriṃśadathāpi vā. atikrūraḥ sa vijñeyo niṃditaḥ sarvakarmasu).