skeptical
1. [ adjective ] (religion) denying or questioning the tenets of especially a religion
Synonyms: sceptical unbelieving disbelieving
Examples:

"a skeptical approach to the nature of miracles"

Related terms: incredulous
2. [ adjective ] marked by or given to doubt
Synonyms: questioning sceptical doubting
Examples:

"a skeptical attitude" "a skeptical listener"

Related terms: distrustful
Similar spelling:   skeptically
  skeptic
  sceptical
  skepticism
  sceptically
  sceptic