及び => and; as well as ~ N2
~にしのびない (~に忍びない)      => cannot bring oneself (to do); unable to bear ~ N1
~とも~ともつかぬ/ともつかない      => whether A or B (shows doubt or uncertainty between the two things) N1
…ひとつも…ない => cannot possibly be ~ N2
Evaluate
もうひとつ…ない => (not) anymore N2
Description
いつかの ... => Previously N4
Time
~且つ(かつ) => and N1
Line up, list
いつも => always; usually; habitually N5
~てもさしつかえない => can ~; it’s okay if ~ (indicates permission or compromise) N1
Concession
には[及「およ」]ばない => There is no need to A N1
Need/Requirements
いつしか => before one knows N2
Accept, agree
いつか => Since when (Don't know) N4
Time