相关单词同義詞suspicious, questionable, 近義詞 dubious, unclear反義詞trustful, trusty臨近詞doubtless, doubt, doubtfully, doubtful of, doubtfulness, doubtful hit, doubtful loan, doubtful word, doubtful case, doubtful tale, doubtful debt, doubtful about相似詞doublethink, doubly, doubt, doubter, doubting Thomas, doubtless, douche, douchebag, 返回 doubtful