にほかならない/からにほかならない => nothing but; none other than ~ N2
どんなに…だろう(か) => how…!; what…! N3
Emphasis on degree
どうにかなる => somehow manage do something about N2
Evaluate
なぜなら(ば)/なぜかというと/どうしてかというと/なぜかといえば => because; the reason is; if you want to know why N3
どうもない => No problem N3
Confirm
~どうにもならない/ できない => not … by any means; no matter how hard one tries, cannot ~ N1
Ability
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
にほかならない => Only A N2
Reason, Result, Response
…どうりがない => No reason... N2
Emphasize negative meaning
にどと~ない => No...second time N2
Emphasize negative meaning
~たらどんなに … か => It will be great if something is done N1
Condition (condition contrary to reality)
~たらどんなに…か => It will be great if something is done N1
Condition (condition contrary to reality)