doubting

(verb) consider unlikely or have doubts about. Synonyms: doubt. Example: "I doubt that she will accept his proposal of marriage."

(verb) lack confidence in or have doubts about. Synonyms: doubt. Examples: "I doubt these reports." "I suspect her true motives." "She distrusts her stepmother."

(adj) marked by or given to doubt. Synonyms: questioning, skeptical, sceptical. Examples: "A skeptical attitude." "A skeptical listener."