うではないか/うじゃないか => Let's go A; Why don't we A? N2
Miscellaneous
ないと,なくちゃ => Must do A N3
Needs, Requirement
ゃしない => Don't/Doesn't A (at all) N1
Will, Decision, Doing
ながら(も) => Although A, B N2
Contrast,Surprise
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
ずじまい => Haven't done A N1
Will, Decision, Doing
てしょうがない/てしかたがない => Very A; Really A; Extremely A N2
Degree, Level, Amount
もなんともない => Not A at all N1
Adjectival, Descriptions
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
[次第「じだい」]だ => It depends on A N2
Based, Focused, Depending on
なくてもいい => Don't have to A N4
Can, Should, Must
かいもなく => Even though A, N2
Contrast,Surprise