ちゃんと => Clear, neat, dignified, complete N3
Result status
ちゃんとする => Serious, tidy, complete N3
Result status
んじゃないか => right? isn't it? let's~; confirmation N4
Confirm
んじゃなかったか => shouldn't have... N4
Regret
ないと/なくちゃ/なきゃ => must do; need to; gotta do ~ N3
んじゃ => If ... then... N4
Condition (hypothetical condition)
ないと,なくちゃ => Must do A N3
Needs, Requirement
んじゃない => can not, impossible to... N4
Ban
なくちゃ => must do; need to; gotta do ~ N3
Necessity, obligation
んじゃないだろうか => could it be that ~; might it be that ~ N4
Speculation
んじゃない => confirmation of information; express surprise towards listener N4
Speculation
~いかんだ / いかんで、~ /  ~いかんによって、~ => It depends ... N1
Related, corresponding