なくして(は)~ない => cannot do without ~ N1
の下で/の下に => under; with ~ N2
て[下「くだ」]さる => Do for someone N4
Give and take advice
以下 => As follows, below N3
Standard
ともなく/ともなしに => somehow; without knowing; without thinking; unconsciously​ ~ N1
昼となく夜となく => day and night N1
Continuous
…くらいの…しか…ない => Only… at low level N2
Limit, limit
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
なしに(は)/なしで(は) => without; without doing ~ N1
の上で(は)/~上 => according to; from the viewpoint of ~ N2
なんとなく => for some reason, somehow N3
Vague
上 => In terms of... N1
Position, perspective