2. (adj)questioning, quizzical perplexed (as if being expected to know something that you do not know)
"he had a quizzical expression"
3. (adj)doubting, questioning, skeptical, sceptical marked by or given to doubt "a skeptical attitude"; "a skeptical listener"
4. (adj)inquisitive, speculative, questioning, wondering(a) showingcuriosity "if someone saw a man climbing a light post they might get inquisitive"; "raised a speculative eyebrow"