1. (

• conspire ,
• cabal ,
• complot ,
• conjure ,
• machinate

) engage in plotting or enter into a conspiracy, swear together; "They conspired to overthrow the government" ;

2. (

• conspire ,
• collude

) act in unison or agreement and in secret towards a deceitful or illegal purpose; "The two companies conspired to cause the value of the stock to fall" ;