un·con·quer·able 
/ˌʌnˈkɑ:ŋkərəbəl/ adjective
/ˌʌnˈkɑ:ŋkərəbəl/ adjective 1 : not able to be conquered or defeated
▪ She has an unconquerable [=indomitable] spirit/will. 2 : not able to be dealt with successfully
▪ seemingly unconquerable [=insurmountable] difficulties/problems
▪ She has an unconquerable [=indomitable] spirit/will.
▪ seemingly unconquerable [=insurmountable] difficulties/problems
