lancinate

lancinate (http://definr.com/lancinate)

     adj : as physically painful as if caused by a sharp instrument; "a
           cutting wind"; "keen winds"; "knifelike cold";
           "piercing knifelike pains"; "piercing cold"; "piercing
           criticism"; "a stabbing pain"; "lancinating pain" [syn:
            cutting, keen, knifelike, piercing, stabbing,
            lancinating]