なしに(は)/なしで(は) => without; without doing ~ N1
しかしながら => however, nevertheless N2
Things do not match the prediction
たしかに/なるほど~かもしれない => might; perhaps N3
Speculation
なくして(は)~ない => cannot do without ~ N1
しか~ない => only; nothing but N4
だけしか~ない => only N3
(の) なら~しろ => If..., do something... N3
Condition (hypothetical condition)
なにかしら => I wonder (feminine) N4
Vague
~だにしない => Even; not even ~ N1
Emphasize the negative meaning
しかない => have no choice but ~ N3
ことなしに => without doing something N1
ないかしら => I wonder (feminine) N4
Aspiration