Meaning of the Sanskrit Word: tanatani

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

Can't find any compound Sanskrit words containing tanatani.