昼となく夜となく => day and night N1
Continuous
どことなく => Somewhere N2
Vague
少なくとも => at least ~ N2
なんとなく => for some reason, somehow N3
Vague
~とおもうまもなく => Suddenly~ N1
Right after...
ことなく => without doing something even once N2
~となく => on countless occasions; many a time N1
Evaluate
ともなく/ともなしに => somehow; without knowing; without thinking; unconsciously​ ~ N1
ないと,なくちゃ => Must do A N3
Needs, Requirement
~といえなくもない => It can be said that ~ N1
Concession
なくともよい => don't need to do something ... N2
Necessity, obligation
ないと/なくちゃ/なきゃ => must do; need to; gotta do ~ N3