気にもならない => it's no use; can't do N1
Evaluate
気味 => -like; -looking; -looked; tending to ~ N2
に気がつく => to notice; to realize N4
...ような気がする => have a feeling that; feels like; seems like; think that ~ N3
Description
... も ... もない => Not...or not N3
Emphasize
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
ないでもない => is not entirely impossible N2
Emphasize negative meaning
なんともおもわない => think nothing of N3
Invariant
[気味「きみ」]だ => Like A, Looking like A (is happening) N2
Adjectival, Descriptions
でもない => neither... nor... N2
Things do not match the prediction
一気に => in one go; without stopping; all at once; immediately; instantly; right away ~ N2
がないでもない => is not entirely impossible N2
Explain