も構わず => without caring; without worrying about ~ N2
気味 => -like; -looking; -looked; tending to ~ N2
も[構「かま」]わず => Without considering A N2
Considering, Concerning
に気がつく => to notice; to realize N4
気にもならない => it's no use; can't do N1
Evaluate
[気味「きみ」]だ => Like A, Looking like A (is happening) N2
Adjectival, Descriptions
一気に => in one go; without stopping; all at once; immediately; instantly; right away ~ N2
さえ/にさえ/でさえ => Even N3
Not only, Not even
...ような気がする => have a feeling that; feels like; seems like; think that ~ N3
Description
~にたえる (耐える)    => bear doing ~ N1
さえ/でさえ => even; so much as; not even N3
とみえて/とみえる => It seems that ~ N1