subliminal
adjective uk/ˌsʌbˈlɪm.ɪ.nəl/ us/ˌsʌbˈlɪm.ən.əl/
下意识的，潜意识的
not recognized or understood by the conscious mind, but still having an influence on it
The leader was interviewed in front of a factory to give the subliminal message that he was a man of the people. 这位领袖在一家工厂前接受采访，暗示自己和老百姓打成一片。
（广告）隐性的
Subliminal advertising tries to influence people without them being aware of it, for example by showing messages for such a short time that people read them without realizing that they have done so.