なしに(は)/なしで(は) => without; without doing ~ N1
なにかしら => I wonder (feminine) N4
Vague
~だにしない => Even; not even ~ N1
Emphasize the negative meaning
ことなしに => without doing something N1
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
にしても~にしても/にしろ~にしろ/にせよ~にせよ => whether… or ~, regardless of whether ~ N2
なんとはなしに => I don't know why, aimless N3
Base, base
抜きにして/ 抜きにしては~れない => without; leaving out; cutting out ~ N2
なしに => Without A, without doing A N1
Conditional, While
にしても/にしろ/にせよ => even if; regardless; whether… or ~ N3
~にしのびない (~に忍びない)      => cannot bring oneself (to do); unable to bear ~ N1
ともなく/ともなしに => somehow; without knowing; without thinking; unconsciously​ ~ N1