kurūra : [adj.] cruel; fierce.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Kurūra (adj.) [Sk. krūra, cp. Lat. cruor thick blood, Gr. kre/as (raw) flesh, Sk. kravih; Ohg. hrō, E. raw] bloody, raw, cruel, in ˚kammanta following a cruel (bloody) occupation (as hunting, fishing, bird killing, etc.) A iii.383=Pug 56 (expld. Pug A 233 by dāruṇa˚, also at PvA 181).

Pali-English Dictionary, TW Rhys Davids, William Stede,