中 => Throughout, all over, during the course of N5
Time
[全「まった」]く~ない => Not A (at all; even a little bit) N3
Not only, Not even
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous