uncongenial in WordNet English dictionary

1. very unfavorable to life or growth
   "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes"
   hostile  uncongenial  unfriendly 
   
2. not suitable to your tastes or needs
   "the uncongenial roommates were always fighting"; "the task was uncongenial to one sensitive to rebuffs"
   uncongenial  incompatible 
   
3. used of plant stock or scions; incapable of being grafted
   uncongenial 
   

uncongenial in English Wiktionary