impetuous russian

• бу́йный

  violent, impetuous, wild, vehement

  unbridled, exuberant

• безу́держный

  unrestrained, unchecked, impetuous

• поры́вистый

  gusty, impetuous, violent, jerky, abrupt

• несде́ржанный

  unfulfilled, violent, unrestrained, lacking self-control, impetuous

• безудержно

  without restraint, unrestrainedly, impetuously