いぜん => ago, since N4
Relationship before and after
ぜひ => by all means; certainly; definitely ~ N5
... いぜん => Before talking about... (Stage) N4
Criticize
... いぜん => ago, since, before, previous (time) N4
Relationship before and after
...ぜ => ending particle; adds force or indicates command N2
Invite and advise
なぜか => somehow; for some reason; without knowing why. N3
Vague
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
... いぜん => Before, Not even, Before even, Precede, Far from N4
Relationship before and after
いぜん (依然) => still, as yet, as it has been N3
Invariant
せいぜい => at the most; at best; to the utmost N3
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
なぜなら => A was done/decided because of B N3
Reason, Result, Response