unpalatable (adj.)
- afflictive
- bitter
- disagreeable
- dislikable
- displeasing
- distasteful
- flat
- flavorless
- galling
- grievous
- inedible
- insipid
- loathsome
- matchless
- nasty
- nauseous
- off
- offensive
- only
- painful
- peerless
- rancid
- repugnant
- savorless
- sickening
- sour
- tasteless
- thankless
- thin
- turned
- ugly
- unappealing
- unappetizing
- unattractive
- undesirable
- unequaled
- uninviting
- unique
- unlikable
- unmatched
- unparalleled
- unpleasant
- unpleasing
- unrivaled
- unsavory
- unwelcome
- washy
- watery
- weak
