を中心に => focused on; centered on~ N2
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
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
せいか => perhaps because ~ N2
せいで/せいか => Because of A, B N3
Reason, Result, Response
せいにする => Blame... N2
Cause, reason
させていただけませんか => Could you please let me do... N4
せいだ => because of; due to N3
Cause, reason
させてあげる => (Allow) N4
Allow
てみせる => I'll show you ~ N4
Purpose, target
せめて => at least; at most ~ N2
ません => be not doing something N5
Result status