incredulous
adj.
"unbelieving," 1570s, from Latin incredulus "unbelieving, incredulous," from in- "not" (see in-(1)) + credulus (see credulous). Formerly also of religious beliefs. Related: Incredulously; incredulousness.
〔蒋〕[in-不，cred=believe，trust 相信，信任] 不轻信的