not believing; showing doubt

unbelieving

feeling, showing, a wish to be unkind because one does not trust a partner or believes one is being cheated

desirous; wary

(US = skeptical) in the habit of not believing, of questioning the truth of, claims, statements etc

disbelieving, leery

having, showing, causing, a feeling of doubt (because a person, thing, cannot be trusted or believed)

distrustful

not confident; not certain or reliable

doubtful, insecure