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
~んがため(に)/~んがための      => in order to ~ N1
...ような気がする => have a feeling that; feels like; seems like; think that ~ N3
Description
気味 => -like; -looking; -looked; tending to ~ N2
めったにない => Rarely N3
Degree. Level, Amount
めったに~ない => hardly; rarely; seldom N3
ためしがない => is never the case; has never happened; I have never seen or heard of ~ N1
Criticize
なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
ないといけない / だめだ => must do; have an obligation to do ~ N4
Necessity, obligation
めったな => hardly; rarely; seldom N2
Ban
んがため => For the purpose of doing A N1
Reason, Result, Response