んじゃ => If ... then... N4
Condition (hypothetical condition)
...ようにおもう / かんじる => Looks like ~; Seems like ~; Appears like ~ N3
Evaluate
んじゃない => can not, impossible to... N4
Ban
じゃありません => not to be N5
Emphasize negative meaning
んじゃなかったか => shouldn't have... N4
Regret
んじゃないか => right? isn't it? let's~; confirmation N4
Confirm
~あるまじき => ~ Unacceptable, not allowed N1
Ban
~をきんじえない(~を禁じ得ない) => can't help but; can't refrain from ~ N1
んじゃない => confirmation of information; express surprise towards listener N4
Speculation
をはじめ/をはじめとする => For example, A N2
Lists, Examples
[謙譲語「けんじょうご」] => Humble form of A, humble form of する verbs N4
Honorifics
じゃありませんでした => was not, were not N5
Emphasize negative meaning