unsavory (adj.)
- bitter
- conscienceless
- corrupt
- corrupted
- criminal
- crooked
- dark
- dead
- derogatory
- devious
- dilute
- diluted
- disagreeable
- discreditable
- disgusting
- dishonest
- dishonorable
- dislikable
- displeasing
- disreputable
- distasteful
- doubtful
- dubious
- evasive
- felonious
- fishy
- flat
- flavorless
- fraudulent
- ignoble
- ignominious
- ill-gotten
- immoral
- inane
- indifferent
- indirect
- infamous
- inglorious
- insidious
- insipid
- jejune
- mild
- nasty
- nauseating
- notorious
- objectionable
- obnoxious
- offensive
- pulpy
- questionable
- repellent
- repugnant
- repulsive
- revolting
- rotten
- sapless
- savorless
- seamy
- shady
- shameless
- shifty
- sickening
- sinister
- slippery
- sordid
- sour
- stale
- suspicious
- tasteless
- thankless
- thin
- tricky
- ugly
- unappealing
- unappetizing
- unattractive
- unconscientious
- unconscionable
- underhand
- underhanded
- undesirable
- unethical
- unflavored
- uninviting
- unlikable
- unpalatable
- unpleasant
- unpleasing
- unprincipled
- unrespectable
- unscrupulous
- unwelcome
- vapid
- washy
- watered
- watery
- weak
- wishy-washy
