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 => -like; -looking; -looked; tending to ~ N2
~んがため(に)/~んがための      => in order to ~ N1
一気に => in one go; without stopping; all at once; immediately; instantly; right away ~ N2
ため(に) => For, because… N4
Cause and Effect
~にしてはじめて      => since at ~ N1
めったに~ない => hardly; rarely; seldom N3
めったにない => Rarely N3
Degree. Level, Amount
そのため(に) => hence; for that reason; because of ~ N3
かりそめにも => Whatever it is..., do not.... N1
Position, perspective
にめんして => having a space looking towards N N2
Situation, case