Meaning of the Sanskrit Word: tanatani

  tanatani—by a tug-of-war    Antya 15.9
  tanatani—some attempt only.    Madhya 9.359
  tanatani—tug-of-war    Antya 15.20
  tanatani—hard endeavor.    Antya 3.48

Can't find any compound Sanskrit words containing tanatani.