Learn how to say Conspiratorial correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word conspiratorial:
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 ⇒ His voice had sunk to a conspiratorial whisper. ⇒ When I went to collect the car, Bill met me with a conspiratorial grin.
something that is conspiratorial is secret and illegal, often with a political purpose ⇒ There is nothing sinister or conspiratorial about the export licensing system. ⇒ a secret and supposedly conspiratorial party meeting