~やむをえず  => unavoidable, no other way to do something N2
Necessity, obligation
いずれにせよ => anyway N2
Situation
…ず、…ず => No... but also no... N1
Explain
~ないでいる/~ずにいる => ~Still not... N1
Invariant
いかに … とはいえ => What ever... N3
Things do not match the prediction
もらえまいか => Help... N2
Benefit
ずじまい => ended up not doing ~ N1
まず...だろう/ ...まい => Surely... N2
Speculation
... おぼえはない => don't remember... N3
Position, perspective
いずれも => both,either,any,all,every N3
As expected
いずれにしろ => anyhow; anyway; either ... N2
Confirm
はずだ/はずがない => it must be; it should be (expectation)/cannot be (impossible) N3