... 前に => Before ... N4
Relationship before and after
~[前「まえ」]に => Before N/Vる(occurs/happens) N5
Time
にする => にする N4
[後「あと」]で => After V1, V2 N5
Time
... 前に => ... in front of, before N4
Relationship before and after
前に => before; in front of ~ N5
~と(が)相まって => combining / together with… N1
Attached
する => become ... N4
Situation, case
に相違ない => without a doubt; certain; sure N2
を前提に => On the premise of N1
Premise
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
手前 => considering; before; in front of; one’s standpoint N1