Word Study
humidify
CIDE DICTIONARY
humidify, v. t.
to render (gases, especially air) humid or to increase the moisture content of; as, We have a machine that humidifies the air in the house. [WordNet 1.5]
OXFORD DICTIONARY
humidify, v.tr. (-ies, -ied) make (air etc.) humid or damp.
Derivative
humidification n.
THESAURUS
humidify
asperge, bedew, bespatter, besprinkle, dabble, damp, dampen, dash, dew, douche, hose, hose down, humect, humectate, irrigate, moisten, paddle, slobber, slop, slosh, sparge, spatter, splash, splatter, sponge, spray, sprinkle, swash, syringe, water, wet, wet downFor further exploring for "humidify" in Webster Dictionary Online