ときているから/ときているので => because of ~ N1
なぜか => somehow; for some reason; without knowing why. N3
Vague
~むきがある(~向きがある)     => There is a tendency N1
なぜなら(ば)/なぜかというと/どうしてかというと/なぜかといえば => because; the reason is; if you want to know why N3
できる => Can do something N5
に...ができる => complete N4
Completed
いぜん => ago, since N4
Relationship before and after
~てしかるべきだ      => should; appropriate; it is natural to do ~ N1
むきもある => There are people… N3
Of course
~あるまじき => ~ Unacceptable, not allowed N1
Ban
~きわまる/きわまりない(~極まる/極まりない)      => extremely; very ~ N1
ぜひ => by all means; certainly; definitely ~ N5