...ぬ => Not (Negative) N3
Emphasize negative meaning
ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
~ぬうちに => While not....; before... N1
Time
ぬきにして/~ぬきで => Exclude A; Stop/end A; Without A N2
Miscellaneous
~ぬばかり => As if; as though N1
Situation
~ぬまに => without one's knowledge, without noticing N1
Time
ぬく => Do A until the end/last N2
Will, Decision, “Doing”
に関わらず/に関わりなく => in spite of; regardless of ~ N2
わ...わ => so much, so many N1
Exclamatory
かたわら => While doing A, (B) N1
Information, Report
かたわら => while; besides; at the same time; in addition N1
にもかかわらず => despite; in spite of; nevertheless; although ~ N2