Which preposition to use with dampening

with Occurrences 3%

" "Ah! a merchant is, like the rest of us, made of nothing better than clay; and, what is worse, it is seldom that, in putting him together, he is dampened with salt water.

to Occurrences 2%

We agreed that it would be amusing to go up with the children, stay a little while to be sure that they could adapt themselves, and then leave; for if there is anything dampening to the ardour of children at play it is a group of elders with minds divided between admiration and correction, punctuating unwise remarks upon beauty and cleverness with "Maud, you are overheated."

of Occurrences 2%

He felt the slow dampening of his own joy, the deadening clutch of yesterday at his heart.

Which preposition to use with  dampening