Meaning of the Sanskrit Word: tivrena

  tivrena—firm    Madhya 22.36, Madhya 24.90, Madhya 24.197
  tivrena—intense    SB 3.25.44, SB 6.10.30
  tivrena—with great force    SB 2.3.10
  tivrena—by very strong    SB 3.2.4
  tivrena—very serious    SB 3.27.5
  tivrena—firmly fixed    SB 3.27.22
  tivrena—consisting of acute    SB 7.1.47

Can't find any compound Sanskrit words containing tivrena.