unpalatable

from WordNet (r) 3.0 (2006)

unpalatable
    adj 1: not pleasant or acceptable to the taste or mind; "an
           unpalatable meal"; "unpalatable truths"; "unpalatable
           behavior" [ant: {palatable}, {toothsome}]

from The Collaborative International Dictionary of English v.0.48

Unpalatable \Unpalatable\
   See {palatable}.

from Moby Thesaurus II by Grady Ward, 1.0

59 Moby Thesaurus words for "unpalatable":
      afflictive, bitter, disagreeable, dislikable, displeasing,
      distasteful, flat, flavorless, foul-tasting, galling, grievous,
      ill-flavored, inedible, insipid, loathsome, matchless, nasty,
      nauseous, off, offensive, only, painful, peerless, rancid,
      repugnant, savorless, sickening, sour, tasteless, thankless, thin,
      turned, ugly, unalluring, unappealing, unappetizing, unattractive,
      undelectable, undelicious, undesirable, unengaging, unenjoyable,
      unequaled, uninviting, unique, unlikable, unmatched, unparagoned,
      unparalleled, unpleasant, unpleasing, unrivaled, unsavory,
      untasteful, untasty, unwelcome, washy, watery, weak