adjective[ before noun ]uk/ˈtel.teɪl/us/ˈtel.teɪl/
泄露秘密的
allowing a secret to become known
She found lipstick on his shirts - the telltale sign that he was having an affair.她发现他的衬衫上有口红印——这可是他有外遇的迹象。
Compare: giveawaynoun(TRUTH)tellingrevealing
telltale
noun[ C ]UKdisapprovinguk/ˈtel.teɪl/us/ˈtel.teɪl/(US tattletale)
告密者,打小报告的人(尤指向老师告状的小孩)
a person, especially a child, who secretly tells someone in authority, especially a teacher, that someone else has done something bad, often in order to cause trouble