[最中「さいちゅう」] => In the middle of A N3
Time, Situation
中 => Throughout, all over, during the course of N5
Time
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
といい~といい => Based on A and B, considering A and B N1
Reason, Result, Response
ずにはいられない/ないではいられない => Can't help but A; A is unavoidable N2
Will, Decision, “Doing”
といえば/というと/といったら => N3
Considering, Concerning
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
[命令「めいれい」] => Do A (command) N4
Can, Should, Must
かい => Really? N4
Sentence Endings
をおいて~ない => Other than A, B N1
(Not)only , (Not) even
~ないでください => Please don't do~ N5
Asking and Telling
くらいだ/ぐらいだ => Around/about N5
Amount