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