DAMPEN

Damp″en (?), v. t. [imp. & p. p. Dampened (?); p. pr. & vb. n. Dampening.] 1. 1. To make damp or moist; to make slightly wet.
2. 2. To depress; to check; to make dull; to lessen.
In a way that considerably dampened our enthusiasm. The Century.