めったにない => Rarely N3
Degree. Level, Amount
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
にわたって/にわたり => Over the course of A (continuous action), Throughout A N2
Time, Situation
といったらない/といったらありはしない => Extremely A, Very A, A beyond description N1
Degree/ Level/Amount
に[沿「そ」]って/に[沿「そ」]い/に[沿「そ」]う/に[沿「そ」]った => Along with A; In line with A N2
Based, Focused, Depending on
にあたって/にあたり => At the time of A (which starts now).., on the occasion of A N2
Time, Situation
に[限「かぎ」]った[事「こと」]ではない => It's not limited to A, it's not only A N1
Degree/ Level/Amount
ことになっている => Plan, rule, decide N2
Information, Report
にいたって => As for A, when it comes to the example A N1
Considering/ Concerning
[全「まった」]く~ない => Not A (at all; even a little bit) N3
Not only, Not even
わけにはいかない => Must not A, Must A N3
Needs, Requirement
にたえる/にたえない => Can't do A, can't stand/tolerate A, Can do A, N1
Potential, Possibility