わけにはいかない => Must not A, Must A N3
Needs, Requirement
なくてはいけない => Must do A; have to A N4
Can, Should, Must
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
なければならない => Must do A; have to A N4
Can, Should, Must
てはいけない => May not A, must not A N4
Can, Should, Must
そうにない => N2
Potential, Possibility
にほかならない => Only A N2
Reason, Result, Response
おまけに => A. In addition, B N2
(Not)only, (Not) even
ずにはおかない/ないではおかない => Will definitely A, N1
Will, Decision, Doing
めったにない => Rarely N3
Degree. Level, Amount
わけがない => There's no reason for A (A should not be possible) N3
Potential, Possibility
だけではすまない => Doing A is not going to suffice N1
Miscellaneous