uncongenial (adj.)
- abhorrent
- aloof
- antagonistic
- antipathetic
- autistic
- backward
- bashful
- blank
- chilly
- clashing
- close
- cold
- constrained
- contradictory
- contrary
- cool
- cranky
- cross
- detached
- disagreeable
- discordant
- discreet
- discrepant
- disharmonious
- dislikable
- displeasing
- disproportionate
- dissident
- dissociable
- dissonant
- distant
- distasteful
- divergent
- expressionless
- forbidding
- frigid
- frosty
- grating
- guarded
- hostile
- icy
- immiscible
- impassive
- impersonal
- inaccessible
- incompatible
- inharmonious
- intolerable
- introverted
- jangling
- jarring
- modest
- morose
- negative
- nongregarious
- odious
- offish
- remote
- removed
- repressed
- repugnant
- reserved
- restrained
- reticent
- retiring
- self-contained
- self-sufficient
- shrinking
- snug
- standoffish
- subdued
- sullen
- suppressed
- unapproachable
- uncommunicative
- undemonstrative
- unexpansive
- unfriendly
- unharmonious
- uninviting
- unlikable
- unlovable
- unpleasant
- unsociable
- unsocial
- variant
- withdrawn
