If someone does something such as speak or smile in a conspiratorial way, they do it in a way that suggests they are sharing a secret with someone.
例句
His voice had sunk to a conspiratorial whisper...他的声音越来越低,最后成了鬼鬼祟祟的耳语。When I went to collect the car, Bill met me with a conspiratorial grin.我去取车的时候碰到了比尔,他咧着嘴会意地笑了笑。
ADJ
(常带有政治目的)阴谋的,密谋的
Something that is conspiratorial is secret and illegal, often with a political purpose.
例句
There is nothing sinister or conspiratorial about the export licensing system.这种出口许可制度没有任何阴险或者见不得人的东西。...a secret and supposedly conspiratorial party meeting.据说包藏阴谋的政党密会
英英词典释义
Adjective
1. relating to or characteristic of conspiracy or conspirators;
"a conspiratorial whisper""the discovery of possible conspirative codes"