ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
ね => isn't it? right? eh? N5
かねない => Afraid that N2
Potential, Possibility
ね => Requests confirmation from the listener N5
Particles
... こととする => to decide on N2
Speculation
~ことにする      => to decide on N4
Decision
ことにする => to decide on N4
Determined, determined
かねる => unable to do something; can’t do something N2
ねばならない => Must A N2
Needs, Requirements
ことにする => Treat as if... (Handling) N1
Means and methods
もうすこし => A little more (level) N4
Compare
ことにする => Decide to N4
Causative, Passive, Volitional