ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
再び => again; once more N2
ね => isn't it? right? eh? N5
手前 => considering; before; in front of; one’s standpoint N1
たび(に) => whenever; every time ~ N3
及び => and; as well as ~ N2
のが下手 => to be bad at doing something N5
のが上手 => to be good at doing something N5
たびに => Every time N3
Time, Situation
~にしのびない (~に忍びない)      => cannot bring oneself (to do); unable to bear ~ N1
かねない => Afraid that N2
Potential, Possibility
ね => Requests confirmation from the listener N5
Particles