っぽい => Seems A; A-ish N3
Adjectival, Description
っぽい => seems like; somewhat; -ish; easily does; often does ~ N2
いっぽう(で) => on one hand, on the other hand; although ~ N2
Compare
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise
せいで/せいか => Because of A, B N3
Reason, Result, Response
せいか => perhaps because ~ N2
せいにする => Blame... N2
Cause, reason
~と言ってもせいぜい~だけだ => Even if it’s said that…but it’s just…. N1
Emphasize
せいだ => because of; due to N3
Cause, reason
いずれにせよ => anyway N2
Situation
させてください/させてもらえますか/させてもらえませんか => please let me do N3