気味 => -like; -looking; -looked; tending to ~ N2
[気味「きみ」]だ => Like A, Looking like A (is happening) N2
Adjectival, Descriptions
という意味だ => This means... N4
気にもならない => it's no use; can't do N1
Evaluate
に気がつく => to notice; to realize N4
一気に => in one go; without stopping; all at once; immediately; instantly; right away ~ N2
...ような気がする => have a feeling that; feels like; seems like; think that ~ N3
Description
~のは…ぐらいのものだ => only (emphasis) N1
Limit
くらいの => Approximate~ N3
Emphasis on degree
いつかの ... => Previously N4
Time
…の…ないの => thinking whether or not to do something... N2
Position, perspective
というのは => because N2