昼となく夜となく => day and night N1
Continuous
~にもなく => ~different from N1
Compare
~になく => different from usual N1
Exception
どことなく => Somewhere N2
Vague
ほどなく => No longer... N2
Time
なんとなく => for some reason, somehow N3
Vague
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
全く~ない => not at all ~ N3
ないでくれ => please don't N4
Ban
少なくとも => at least ~ N2
て/なくて => Because/Because not N4
くないです => Adjective negation N5
Emphasize the negative meaning