WordReference Random House Learner's Dictionary of American English © 2015
mois•ten /ˈmɔɪsən/USA pronunciation v. 

    to (cause to) become moist: [+ object]moistened her lips before speaking.[no object]Her lips moistened.
moist•en•er, n. [countable]

Collins Concise English Dictionary © HarperCollins Publishers::

moisten /ˈmɔɪsən/ vb
  1. to make or become moist

'moisten' also found in these entries:

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