Словарь синонимов английского языка - secretly

(adv) surreptitiously, auietly, privately, covertly, on the q.t. or Q.T., furtively, stealthily, mysteriously, clandestinely, in secret, confidentially, on the sly, slyly, sub rosa, sub sigillo: I can tell you secretly that she is wanted by the police. Henry secretly rents videotape cartoons to watch at weekends.