sceptical

adjectives

marked by or given to doubt
"a skeptical attitude"; "a skeptical listener"
doubting, questioning, sceptical, skeptical
is derived from
scepticism
is derived from
sceptic
denying or questioning the tenets of especially a religion
"a skeptical approach to the nature of miracles"
disbelieving, sceptical, skeptical, unbelieving
is derived from
scepticism
is derived from
sceptic