Origin of swizzlefrom uncertain or unknown; perhaps
verbswiz·zled, swiz·zling, swiz·zles
Origin of swizzleOrigin unknown
(third-person singular simple present swizzles, present participle swizzling, simple past and past participle swizzled)
Unknown etymology, 1813. Original sense “alcoholic drink", possibly a variant of switchel (“a drink of molasses and water, often mixed with rum"), attested 1790, itself of uncertain origin. Possibly influenced by fizz.
In verb sense “to stir", from swizzle stick (“stick for stirring alcoholic drinks"), itself attested 1859.