Synonyms:
- cautious,
- disinclined to believe,
- disposed to doubt,
- guarded,
- hard of belief,
- impervious to persuasion,
- incredulous,
- leery,
- shy of belief,
- skeptical,
- suspecting,
- suspicious,
- unconvincible,
- uncredulous,
- unpersuadable,
- unpersuasible,
- unwilling to accept,
- wary