appetize (v.) Look up appetize at Dictionary.com
"make hungry, give an appetite to," 1782 (implied in appetized), irregularly formed (on model of verbs in -ize) from appetite, or else a back-formation from appetizing. The French word is appétissant. "In Fr. only the pples. are found; and in English the simple vb. is perhaps only colloquial" [OED].