Meaning of the Sanskrit Word: autkanthyat

  autkaṇṭhyāt—because of great anxiety    SB 1.10.14
  autkaṇṭhyāt—by excessive anxiety    SB 3.2.1
  autkaṇṭhyāt—because of eagerness    SB 4.7.11

Can't find any compound Sanskrit words containing autkanthyat.