Which preposition to use with demoralises

in Occurrences 4%

The coaling system is, no doubt, demoralising in itself, as it enables Negroes of the lowest class to earn enough in one day to keep them in idleness, even in luxury, for a week or more, till the arrival of the next steamer.

to Occurrences 3%

I do not know that I carried much away with me, except the general impression, that our trade is carried on on principles which are dishonest as regards the Chinese, and demoralising to our own people.

for Occurrences 1%

It's demoralising for all concerned."

with Occurrences 1%

He did not apparently wound her, but the reports brought her to the charge once more, and the elephant, by this time fairly tired of the game, and thoroughly demoralised with fear, bolted right away, and nearly cracked poor Fullerton's head against the branch of a tree.

Which preposition to use with  demoralises