Answer: emulsify

AnswerCrossword Clue
EMULSIFYPrepare a film coating
EMULSIFYDisperse oil in water
EMULSIFYPrepare a salad dressing, perhaps
emulsifyconvert (two or more immiscible liquids) into an emulsion
emulsifyto convert into an emulsion
emulsifyto disperse (as an oil) in an emulsion