flavor (n.) Look up flavor at Dictionary.com
c.1300, "a smell, odor" (usually a pleasing one), from Old French flaour "smell, odor," from Vulgar Latin flator "odor," literally "that which blows," from Latin flator "blower," from flare "to blow, puff," which is cognate with Old English blawan (see blow (v.1)).

The same Vulgar Latin source produced Old Italian fiatore "a bad odor." Sense of "taste, savor" is 1690s, perhaps 1670s; originally "the element in taste which depends on the sense of smell." The -v- is perhaps from influence of savor.
flavor (v.) Look up flavor at Dictionary.com
1730s, from flavor (n.). Related: Flavored; flavoring.