Which preposition to use with inappeasable

for Occurrences 1%

Like a funeral-knell, this despairing chant haunted him, now that he was in bed, prostrated by fever and agitated by an anxiety so much the more inappeasable for the fact that he could not discover its cause.

in Occurrences 1%

The soul is touched with the strong necessity of loving; and its power becomes intense and inappeasable in proportion to the capacity of the heart; and yet some of the greatest of those have reposed so supremely in the innate and ineffable Ideal that to the uninitiated they have seemed in their serenity as pulseless as pearls.

Which preposition to use with  inappeasable