1) Appetizers 2) Grinds 3) Hones 4) Makes keen 5) Makes sharper 6) Puts an edge on 7) Rubs on an oilstone 8) Sharpens 9) Sharpens an ax 10) Stimulates 11) Stimulates as an appetite 12) Works on the edge Found on https://www.crosswordclues.com/clue/whets