1. Not in agreement or harmony
   "views absonant with present-day ideas";
   - discordant
    
2. Causing strong moral disgust or loathing
   "an absonant deed";
   - abhorrent, detestable, obscene, repugnant, repulsive

See also: at variance, despicable, discrepant, dissentious, dissonant, divisive, factious, loathsome, nauseating, offensive, sick, sickening, slimy, ugly, unsavory [US], unsavoury [Brit, Cdn], unworthy, vile, worthless, wretched