TOEFL moisten Definition To make slightly wet or damp. Example "Moisten the cloth before wiping the surface." Sign in to save TOEFL PDF — $25 ← moist moisture → Study tips featuring "moisten" TOEFL Academic Vocabulary: Study by Topic Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze