As a verb moistens
is third-person singular of moisten.
As a noun dampener is
a device that moistens or dampens something.
moistens
English
Verb
(head)
(moisten)
moisten
English
Verb
(
en verb)
To make moist or moister.
To become moist or moister.
dampener
English
Noun
(
en noun)
A device that moistens or dampens something.
(figurative) A discouraging event or remark.