Which preposition to use with unimpressed

by Occurrences 6%

At the bottom of his heart he shared Patricia's regret that the Stapylton pedigree was unadorned by a potentate, because nobody can stay unimpressed by a popular superstition, however crass the thing may be.

with Occurrences 2%

To the mind of a savage man unimpressed with the idea that self-murder is forbidden by law or custom, there can seem no reason why, if he so wills, he should not follow his beloved chief, master, or friend to the "happy other world;" and when this is remembered we need not feel astonished as we read of accounts in which scores of self immolations are related.

as Occurrences 1%

Waitresses ran chattering back and forth to the kitchen, unimpressed as ever with anyone who did not live in Lincoln County.

Which preposition to use with  unimpressed