N1
ないでもない
Kind of, Might, Slightly, It's not (impossible) that, Somewhat, In some respects
気持ち
は
わから
ない
で
も
ない
が
I can’t say I don’t understand how you feel (literally: “It’s not that I don’t understand your feelings, but…”).
まあ
、
そう
し
たく
なる
気持ち
も
わから
ない
で
も
ない
。
Well, I can’t say I don’t understand the feeling of wanting to do that.
N2
なくはない
It's not that…, Kind of, might, Slightly, Somewhat, In some respects
N2
かねない
Might, Could be, Capable of, Possible
N4
はずがない
Hardly possible, Cannot be, Highly unlikely, Improbable
N2
ものか
Definitely not, Absolutely not, Impossible, Do you really think~?
N3
ないことはない
Is not impossible, It doesn't mean that it isn't