Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
hot-headed [hɔtˈhɛdɪd] adj (person) поры́вистый/поры́вист (remark) необду́манный/необду́ман
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.